£279 Find Cheap Flights from London to Idaho

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to Idaho departing on 9/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Idaho

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Idaho.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Idaho.
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Cheap Flights from London to Idaho

Cheapest return prices found by our users on KAYAK in the last 72 hours
Boise
Boise2 stops£562
Idaho Falls
Idaho Falls1 stop£737
Boise
Boise2 stops£562
Idaho Falls
Idaho Falls1 stop£737

Book Cheap London to Idaho Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from London to Idaho that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from London to Idaho

Tue, 10 Mar - Tue, 17 Mar
United Airlines Logo
06:35 - 21:03LHR-GEG
21h 28m2 stops
United Airlines Logo
12:42 - 12:00GEG-LHR
16h 18m1 stop
£561United Airlines
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Tue, 10 Mar - Tue, 17 Mar
United Airlines Logo
06:35 - 21:03LHR-GEG
21h 28m2 stops
United Airlines Logo
06:00 - 06:20GEG-LHR
17h 20m2 stops
£562United Airlines
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Mon, 20 Apr - Thu, 30 Apr
Lufthansa Logo
07:25 - 22:47LHR-BOI
22h 22m2 stops
Lufthansa Logo
14:43 - 12:20BOI-LHR
14h 37m1 stop
£581Lufthansa
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Tue, 10 Mar - Tue, 17 Mar
Icelandair Logo
11:55 - 21:37LGW-GEG
16h 42m2 stops
Icelandair Logo
12:00 - 10:55GEG-LGW
15h 55m2 stops
£586Icelandair
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Tue, 17 Mar - Tue, 24 Mar
Lufthansa Logo
11:35 - 21:29LHR-BOI
15h 54m1 stop
Lufthansa Logo
14:40 - 09:40BOI-LHR
13h 00m1 stop
£587Lufthansa
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Tue, 10 Mar - Tue, 17 Mar
Icelandair Logo
11:55 - 21:37LGW-GEG
16h 42m2 stops
Icelandair Logo
12:00 - 10:55GEG-LGW
15h 55m2 stops
£587Icelandair
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Mon, 4 May - Sun, 10 May
Virgin Atlantic Logo
20:10 - 16:11LCY-GEG
28h 01m2 stops
Virgin Atlantic Logo
13:00 - 17:20GEG-LCY
20h 20m2 stops
£738Virgin Atlantic
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Fri, 6 Feb - Fri, 13 Feb
Virgin Atlantic Logo
17:50 - 21:55LHR-SUN
35h 05m2 stops
Virgin Atlantic Logo
15:22 - 10:00SUN-LHR
11h 38m1 stop
£790Virgin Atlantic
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Fri, 6 Feb - Sat, 14 Feb
KLM Logo
20:25 - 14:50LHR-SUN
25h 25m2 stops
KLM Logo
12:43 - 10:00SUN-LHR
14h 17m1 stop
£799KLM
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Sun, 4 Jan - Sun, 11 Jan
KLM Logo
17:20 - 14:50LHR-SUN
52h 30m2 stops
KLM Logo
12:55 - 16:05SUN-LHR
20h 10m2 stops
£893KLM
Find Deal
Booking Insights

KAYAK's insights & trends for London to Idaho flights

Get data-powered insights and trends into flights from London to Idaho to help you find the cheapest flights, the best time to fly and much more.

How much is a return flight from London to Idaho?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from London to Idaho departing in March.

What is the cheapest month to fly from London to Idaho?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London to Idaho, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from London to Idaho is September, when tickets cost £604 (return) on average. On the other hand, the most expensive months are December and July, when the average cost of return tickets is £1,053 and £961 respectively.

What’s the cheapest day of the week to fly from London to Idaho?

The average price of all round-trip flights from London to Idaho clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from London to Idaho, look for departures on Wednesdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Idaho, Wednesday is the cheapest day to fly and Thursday is the most expensive.

How far in advance should I book a flight from London to Idaho?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London to Idaho, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below-average price on a flight from London to Idaho, you should book around 2 weeks before departure, which saves you about 38% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Good to know - Cheap tickets from London to Idaho

Low seasonMarch
Cheapest flight£310
Best time to beat the crowds (17% less expensive on average)
Most popular time to fly (14% more expensive on average)
Flight from London Heathrow Airport to Boise

FAQs - booking Idaho flights

  • How does KAYAK find such low prices on flights from London to Idaho?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to Idaho.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to Idaho?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from London to Idaho is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London to Idaho?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from London to Idaho with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to Idaho?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from London to Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Idaho?

    The cheapest time of day to fly to Idaho is generally in the afternoon, when retur flights cost £665 on average. Morning departures are around 21% cheaper than evening flights, on average. The most expensive time of day to fly to Idaho is generally at night, which is peak travel time and where the average cost of a ticket is £862.

Reviews of the top 5 airlines flying from London to Idaho

 
See real verified KAYAK customer reviews for airlines flying from London to Idaho. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from London to Idaho? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.7
KLMOverall score based on 1412 reviews
7.7Comfort
7.1Entertainment
7.3Food
8.4Crew
7.8Boarding
Airline reviews

At the airport, terrible, I do not want to even remember it. It was too humiliating for a business class passenger.

2.0 MediocreElizabeth, Oct 2025CDG - AMS
Read more KLM reviews

At the airport, terrible, I do not want to even remember it. It was too humiliating for a business class passenger.

Flight was ok but lack of communication cost me to literally beg to be put on another flight as connecting flight had departed

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

Short flight so it was okay. Nice crew, all very pleasant and professional. We were near the back in row 27 so just as we got our drinks, we started our descent so had to drink very quickly!

KLM remains a quality flag carrier airline which maintains its standards whilst all their competitors are lowering theirs.

The baggage drop-off in Stuttgart is bad: after online check-in you cannot use the automated baggage drop off as indicated on the website. You can use the terminals but have to cue to 1 of three open and slowly working counters to drop the bags. took about 45 minutes wait time.

Our first flight was delayed so we missed our connecting flight. However it was easy to book a later flight on their app.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

Klm start boarding while somw air issue in the plan

The service was great. However the lounge only gets passing grade

Great staff great experience, made a 2 hour delay very bearable

Great staff, great experience, made a 2 hour delay very bearable

Food was the worst I’ve had on a VA flight. Normally it’s a lot better

I was my pleasure to fly virgin on my birthday for my first solo trip ever 🫶🏼

These are one of the older seat arrangements facing away from the windows! Not particularly convenient sets. No storage spaces. NO COAT HANGING HOOKS. Inconvenient business class seat compared to any other airlines of similar class. Staff are excellent! Extremely professional, friendly. Food is good too.

Overall, flight was excellent but check in was very slow for Premium Economy. Economy queue was shorter but we weren't allowed to use it.

The staff was not very polite but the flight was very very nice and comfortable and the entertainment was great

Great crew - old style upper class seats on the older fleet now feels dated

Premium economy more comfortable than economy, but not by much. Did was awful, do not try the omelette. Flight crew were helpful. Flight was delayed by over an hour. Overall but bad, arrived safely and thank God.

Food was excellent. Service was very good. Staff was very helpful to all passengers.

We boarded late. The crew at the airport was dismissive. The seat cushion on the plane was uncomfortable.

Very thoughtful flight attendant offered me water immediately since I had run to make my connection.

Door to door, the crew and staff were amazing. It was a stressful travel day with delays, but they were focused on customers and doing what they could to get us to our destinations.

I dread trans-Pacific flights. They are very long. This was my first time on Universal, and it was my best crossing ever. The staff were professional, the hospitality was great, and the food was delicious. The entertainment system filled the long flight hours. I will seek out Universal flights from now onwards. 🙂

United has come a long way, it’s been a fantastic experience traveling with them.

Even though we were delayed, we were able to make our connection

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

Great crew, excellent landing, good food. Over all great experience. Thank you!

Older aircraft, no meal, only food was for purchase. Not impressed United.

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Airline food is airline food, but the plane was wonderful and the seating comfort outstanding. One of my best flights in quite a while.

Crew was outstanding, helpful and friendly. Food is deteriorating. The snack at the end of the flight was not good, a greasy moosh of toast cheese snd other unidentifiable ingredients. Coming from Germany a pretzl with butter would have been better. Entertainment had a great selection.

Smooth flight with enough time for connection. Ran out of meal options. In-flight and gate staff were friendly and helpful. Good service overall.

Paid for exit row at the back of the plane. Window seat with lots of leg space. Food was inedible (as usual). Brought my own.

The seat space seemed small especially when the person ahead reclined but other than that, very good.

Luggage transfer in Chicago was not performed in time. I received my luggage at my destination two days later.

Give yourself over 2+ hours layover because if flight is slighlty delayed and you miss your connection, Lufthansa will do nothing for you

We would have missed our connection from Munich to Boston but we had a van outside the plan that wisked us to our terminal. Much appreciated and we didn’t even realize that Lufthansa had done this until the announcement on disembarkation. Well organized airline! Will definitely fly Lufthansa again!!!

Everything went well. I will fly with Lufthansa again. And use Kayak whenever I book flights

Bought a seat in a flight that got changed out so ended up paying for a seat I would have had if I hadn't paid.

main meals are horrible but then you dont fly for the food

It was good. Couldn’t Check in online and select seats

It was great. Enough space and room for legs . Great service to.

⭐ British Airways Review — A Journey of Highs, Lows, and Lessons ⭐ I recently flew Business Class round-trip from Boston to Mumbai with British Airways, and my experience was a tale of two extremes — from disappointment to exceptional service, and then back to inconsistency. Boston → London: A Surprisingly Poor Start My journey began on a disappointing note. On a 6-hour Business Class flight, I was surprised to discover that there wasn’t a single proper vegetarian meal option available. I was offered a few bakery items only after repeatedly requesting something to eat. The flight attendant shrugged, offered no solution, and eventually — quite literally — threw some bread at me after much delay. This was not only disheartening, it was extremely surprising given my wonderful Business Class experience with BA last year. I stepped off that flight genuinely hungry and had to make a mad dash to the lounge just to get a proper meal. London → Mumbai: A Complete Turnaround The next sector restored my faith in British Airways. The entire crew was warm, welcoming, attentive, and genuinely caring. A special shoutout to Phiroze and the entire team serving the Business Class cabin — their professionalism, hospitality, and thoughtful service were extraordinary. They truly embodied what makes British Airways a global leader, and I am deeply grateful for the experience they provided. This is the BA I know and love. Mumbai → London: A Strange Meal Schedule This sector was generally fine, but the meal timing was puzzling. Lunch at 10:30 AM — for a Business cabin — felt unusual, and most passengers, including myself, barely touched it. The rest of the service was smooth, but the scheduling definitely needs a rethink. London → Boston: Mixed Experience Again The flight itself was decent, but the Business Lounge at Heathrow for this leg was a letdown. Arrived during lunch hours: no hot vegetarian options available Lounge area: dirty dishes everywhere Even after politely alerting the staff, the dishes were ignored and left uncleared For a premium cabin passenger — and at one of the world’s busiest international hubs — this was disappointing. Overall Impression My journey with British Airways felt inconsistent — two great sectors sandwiched between two that fell short of the BA standard. When BA is good, it is world-class. When it misses, the gap is noticeable. I genuinely hope the airline takes this feedback as constructive insight. I continue to believe in British Airways, and I commend the outstanding crew on the London → Mumbai sector — they were the highlight of my entire trip. With a little more focus on vegetarian meal availability, lounge service, and consistency across crews, BA can ensure every Business Class passenger experiences the premium journey they promise.

We were in business class and I had seat # 1. This was a night flight and after dinner was served, lights were dimmed and I went to sleep. The crew were loud and noisy so I didn’t get much sleep. I expect the crew to enjoy themselves but would Appreciate some decency in staying quiet while the passengers sleep

Have travelled business class with other airlines who profess to be the best in the world. They can however not beat the service and comfort that BA provide.

Great on board entertainment Tasty food Cattle class obviously crammed but not as bad as shorter hall flights

Logan gate staff was unhelpful. Arrived early, come to find out the airbus scheduled was reassigned and I did not have a seat. The desk agent spoke to his supervisor who instructed him to give me a boarding pass to get up to gate area, he was polite. At the gate the fellow was sitting to the side with two other BA staff . I asked him if he could help me, his answer was” we are on a break, we are closed” then turned his back. I am almost 70, drove 4 1/2 hours to Boston and had been looking forward to this trip for 5 months. I have worked in service many times in my life and this is not how it is done. I eventually (1/2 hr) before boarding was able to get a seat. The rest of the flight experience was unremarkable.

The boarding process was chaotic at LHR and the seat was not as comfortable as other airlines....

Great flight. One unique individual assisting in business class who should have not been there. Need more generic meals, not British centric.

Everything you need to know for your flight from London to Idaho

Cabin class types available on flights to Idaho

Cabin classes available on flights to Idaho. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.