£394 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 7/9. 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, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Idaho, as well as popular online travel agencies
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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£702
Idaho Falls
Idaho Falls2 stops£800
Boise
Boise2 stops£702
Idaho Falls
Idaho Falls2 stops£800

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

Wed, 9 Sep - Sun, 13 Sep
United Airlines Logo
08:40 - 10:35
LHR
-
GEG
33h 55m
2 stops
United Airlines Logo
11:16 - 21:35
GEG
-
LHR
26h 19m
2 stops
£653United Airlines
Wed, 9 Sep - Sun, 13 Sep
United Airlines Logo
08:40 - 10:35
LHR
-
GEG
33h 55m
2 stops
United Airlines Logo
11:16 - 06:45
GEG
-
LHR
35h 29m
1 stop
£654United Airlines
Wed, 27 May - Wed, 3 Jun
Scandinavian Airlines Logo
19:30 - 22:58
LHR
-
BOI
34h 28m
2 stops
Scandinavian Airlines Logo
15:23 - 16:00
BOI
-
LHR
41h 37m
2 stops
£702Scandinavian Airlines
Wed, 27 May - Wed, 3 Jun
Multiple Airlines Logo
11:40 - 23:58
LHR
-
BOI
19h 18m
1 stop
Multiple Airlines Logo
18:07 - 15:35
BOI
-
LHR
14h 28m
1 stop
£740Multiple Airlines
Thu, 21 May - Thu, 4 Jun
Multiple Airlines Logo
18:15 - 22:58
LHR
-
BOI
35h 43m
1 stop
Multiple Airlines Logo
08:38 - 14:00
BOI
-
LHR
22h 22m
2 stops
£754Multiple Airlines
Mon, 8 Jun - Mon, 15 Jun
Lufthansa Logo
14:50 - 21:35
LHR
-
BOI
13h 45m
1 stop
Lufthansa Logo
14:40 - 12:25
BOI
-
LHR
14h 45m
1 stop
£783Lufthansa
Fri, 7 Aug - Sat, 29 Aug
Scandinavian Airlines Logo
19:30 - 22:30
LHR
-
BOI
34h 00m
2 stops
Scandinavian Airlines Logo
12:42 - 09:20
BOI
-
LHR
37h 38m
2 stops
£784Scandinavian Airlines
Tue, 23 Jun - Sat, 4 Jul
Lufthansa Logo
13:00 - 13:08
LHR
-
BOI
31h 08m
1 stop
Lufthansa Logo
05:00 - 10:00
BOI
-
LHR
22h 00m
2 stops
£795Lufthansa
Tue, 1 Sep - Fri, 25 Sep
Icelandair Logo
13:05 - 22:56
LHR
-
IDA
16h 51m
2 stops
Icelandair Logo
06:18 - 20:20
IDA
-
LHR
31h 02m
2 stops
£800Icelandair
Mon, 8 Jun - Mon, 15 Jun
Icelandair Logo
15:40 - 18:14
LGW
-
BOI
33h 34m
2 stops
Icelandair Logo
20:47 - 14:40
BOI
-
LGW
34h 53m
2 stops
£888Icelandair
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 May.

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 January, when tickets cost £497 (return) on average. On the other hand, the most expensive months are July and August, when the average cost of return tickets is £631 and £586 respectively.

Good to know - Cheap tickets from London to Idaho

Low seasonJanuary
Best time to beat the crowds (23% less expensive on average)
Most popular time to fly (20% more expensive on average)

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.

Reviews of the top 4 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.
7.4
United AirlinesOverall score based on 9672 reviews
8.1Crew
7.1Entertainment
7.3Comfort
7.7Boarding
6.6Food
Airline reviews

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

4.0 OkayMichael, Apr 2026
SNA - DEN
Read more United Airlines reviews

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

Flight crew was super friendly and helpful. Food was frequent and honestly pretty good. Plenty of on-board entertainment. Economy seats are super cramped for such a long flight, but the crew allowed people to get up and stretch, and kids could wander with their parents, so we all made it work. Overall a very good experience.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

Outstanding service, great food, friendly & efficient crew, safe & comfortable flight

Staff were not attentive, wifi did not work, cut my head in the bathroom due to the position of the soap on the sink, had blood running down my face, told staff, they had no expression no sympathy, didn't even say "sorry", they said "oh we will have a look at that" about 10 mins later the purser brought me a bandaid, still no sorry.... Shocking

Starlink is great Crew was polite Business class didn’t get a welcome drink just water and snacks were ok

Seating and zone. The minor I went with didn’t even seat close to me

My seat 3G did not go down fully and the buttons were not working properly

Food has been disappointing in both legs of flight to india

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

The Icelandair crew was so kind!!! Thank you for making my first trip to Paris a great one!

I am not going to fillo this out for each leg of my trip. My first review holds for the experience

Second time with Saga Premium, everything was fab, but the entertainment centre on both my flights didn't work, plus the seat on the NY to Rek flight (Airbus) was so solid and so uncomfortable. The 737Max flight's seat was much, much better.

The most uncomfortable seat i’ve ever had on a flight

Waiting area on top of stairs before Boarding the bus wasn’t great. Took a long time to load the bus to gate.

The real reason why the flying experience with Icelandair ---was mediocre was because of not being able to enter DC airspace yesterday evening. This obviously was out of your control and do realize this is a safety issue. I did notice---that everything was being done to get us to Washington Dulles and we did arrive at Dulles SAFELY with just a 4 hour delay. Thank you!

The staff was kind and helpful. There was no food, and you needed to bring your own earphones to use the entertainment, which I didn’t know.

They wouldn’t check in my luggage even though I had one checked bag prepaid. So I took my bag to the gate and tried to check it in there and two employees scolded me for bringing a large bag to the gate. I told them I was trying to check it in and that it was prepaid, and they said they couldn’t guarantee that it would arrive at my destination but they finally let me drop it off when boarding the plane and pick it up right after exiting the plane. There was no food, and there was no entertainment.

Overall satisfied and would fly with them again. They could improve the check-in efficiency at BOS, we got backed up because it seemed there were passengers requiring much more time for check in.

The customer service was unbeatable from the wheelchair assist team to the flight attendants. The pilot also did an excellent job managing the turbulence.

Service was excellent. Flight was only about half full, which meant we had tons of room to stretch out. Boarding area was nice and well organized, flight attendants were super friendly and attentive and we loved the 3 snacks!

My flight was cancelled, but it was not Kayak's fault. Kayak did require me to pay for the ticket twice to two different venders who paid Lufthansa. Kayak/Lufthansa owes me for the first booking I made first was fraudulent on the part of the subcontracting ticket seller. There will be litigation over this issue under the current passenger protection laws.

flight was half full, plenty of empty seats, was able to lie down across 4 seats, food was good, arrived on time

Was never allowed on and not refunded the full amount of the ticket plus charged a $300 processing fee.

Terrible. Our flight was completely cancelled with no options to rebook until 4 days later.

Generally good. Not their fault but the design of the Boeing 747 had seating supports directly in line with my legs. So my legs always had to straddle this support which caused body misallignment. Such poor design from Boeing. There was no USB port for me to charge my phone. The screen touch control was very poor.

I like crew. They are friendly. The flight was delayed to take off for 1hr and that caused panic at Houston Airport to catch connecting flight due to security check delay. If it has reached on time I would have sufficient time in collecting bags and security check

How about changing the personal out to more friendly human beings? This team was pretty arrogant. No fun!!

Everything could have been better. What needed to be wrong with United went wrong

Excellent service. The crew goes above their way to make the customer comfortable.

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.