£334 Find Cheap Flights from London Heathrow Airport 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 Heathrow to Idaho departing on 29/8. 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

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 Heathrow to Idaho

Cheapest return prices found by our users on KAYAK in the last 72 hours
Boise
Boise2 stops£556
Idaho Falls
Idaho Falls1 stop£653
Hailey
Hailey2 stops£725
Boise
Boise2 stops£556
Idaho Falls
Idaho Falls1 stop£653
Hailey
Hailey2 stops£725

Book Cheap Heathrow to Idaho Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Heathrow 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 Heathrow to Idaho

Wed, 10 Sep - Wed, 17 Sep
Lufthansa Logo
07:25 - 21:03LHR-GEG
21h 38m2 stops
Lufthansa Logo
12:35 - 10:25GEG-LHR
13h 50m1 stop
£518Lufthansa
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Fri, 12 Sep - Fri, 19 Sep
Lufthansa Logo
07:25 - 21:03LHR-GEG
21h 38m2 stops
Lufthansa Logo
07:23 - 07:25GEG-LHR
16h 02m1 stop
£520Lufthansa
Find Deal
Sun, 14 Sep - Sun, 21 Sep
United Airlines Logo
07:25 - 23:05LHR-GEG
23h 40m2 stops
United Airlines Logo
16:00 - 20:40GEG-LHR
20h 40m2 stops
£522United Airlines
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Fri, 12 Sep - Fri, 19 Sep
United Airlines Logo
07:25 - 12:36LHR-GEG
37h 11m2 stops
United Airlines Logo
16:00 - 20:40GEG-LHR
20h 40m2 stops
£525United Airlines
Find Deal
Mon, 6 Oct - Mon, 13 Oct
Virgin Atlantic Logo
13:25 - 20:16LHR-BOI
13h 51m1 stop
Virgin Atlantic Logo
16:46 - 14:15BOI-LHR
14h 29m1 stop
£620Virgin Atlantic
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Sat, 13 Sep - Sat, 20 Sep
British Airways Logo
09:45 - 21:25LHR-IDA
18h 40m2 stops
British Airways Logo
13:35 - 12:15IDA-LHR
15h 40m2 stops
£728British Airways
Find Deal
Sat, 13 Sep - Sat, 20 Sep
British Airways Logo
09:15 - 21:25LHR-IDA
19h 10m2 stops
British Airways Logo
13:35 - 06:25IDA-LHR
33h 50m1 stop
£729British Airways
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Sun, 10 Aug - Fri, 15 Aug
KLM Logo
10:55 - 16:18LHR-GEG
13h 23m1 stop
KLM Logo
13:00 - 09:50GEG-LHR
12h 50m1 stop
£903KLM
Find Deal
Mon, 11 Aug - Fri, 22 Aug
KLM Logo
06:30 - 14:45LHR-GEG
16h 15m2 stops
KLM Logo
13:00 - 09:50GEG-LHR
12h 50m1 stop
£1,045KLM
Find Deal
Wed, 13 Aug - Wed, 20 Aug
Virgin Atlantic Logo
06:30 - 21:29LHR-JAC
21h 59m2 stops
Virgin Atlantic Logo
11:40 - 11:20JAC-LHR
16h 40m2 stops
£5,324Virgin Atlantic
Find Deal
Booking Insights

KAYAK's insights & trends for Heathrow to Idaho flights

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

How much is a round-trip flight from London Heathrow Airport to Idaho?

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Heathrow Airport 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 Heathrow Airport to Idaho is January, when tickets cost £566 (return) on average. On the other hand, the most expensive months are August and December, when the average cost of return tickets is £1,016 and £832 respectively.

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

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

When flying from London Heathrow Airport to Idaho, you should consider leaving on a Wednesday and avoid Sundays if you are looking for the best rates. For your return to London Heathrow Airport, you’ll find the best rates on Wednesdays and the most expensive ones on Thursdays.

How far in advance should I book a flight from London Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport to Idaho, you should book around 5 weeks before departure, which saves you about 42% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.


Good to know - Cheap tickets from London Heathrow Airport to Idaho

Low seasonFebruary
Cheapest flight£334
Best time to beat the crowds (19% less expensive on average)
Most popular time to fly and prices are also 0% lower on average.
Flight from London Heathrow Airport to Spokane

FAQs - booking Idaho flights

  • How does KAYAK find such low prices on flights from London Heathrow Airport 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 Heathrow Airport to Idaho.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from London Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport 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 £869 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 £1,126.

Reviews of the top 5 airlines flying from Heathrow 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 Heathrow 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.
7.6
FinnairOverall score based on 1316 reviews
6.7Food
6.9Entertainment
7.6Boarding
8.1Crew
7.5Comfort
Airline reviews

It was okay. The airplane was a little smaller than a flight from Thailand to Helsinki.

6.0 GoodAnonymous, Jul 2025HEL - DFW
Read more Finnair reviews

It was okay. The airplane was a little smaller than a flight from Thailand to Helsinki.

Wish that everyone would board the back of the plane first. Also let kids on first. The gate wasn’t open at arrival and we waited 45 minutes to takeoff. They made up for time in the air.

This was an absolutely exceptional flight. The flight attendants were extremely attentive and very friendly. They seemed to go out of their way to make us comfortable and to make sure that we had everything we needed., We were in business and were very happy with the size and the details for our pods. We would definitely recommend Finnair and will definitely be flying with them again.

We had an excellent trip with Finnair. This was our first time and we’re very pleased. The only issue was with the boarding - it was a little bit confusing and needs a little bit of streamlining.

Crew very lovely. Arrived an hour late due to bad weather. We were given new tickets to an other flight but it could have been organised better, so we did not have to run through the whole airport to.

Flight delayed over an hour. They said they would hold our connection but then did not.

Major problems checking in at Alaska counter. They could not find our booking code because it came from Finnair.

Do not use KAYAK or Finair for future travel. Unless you purchase the tickets directly from the airline, you were going to have a difficult time checking in. Kayak canceled my flights twice and ended up causing great difficulty in me getting back from Europe because they double sold my tickets between American Airlines and Finair. The event caused significant delays and led to me having to rebook my flights.

The staff were all particularly great. The plane was clean and fresh. The bassinet worked great. It was all very nice.

Boarding uncomfortable. Stewardess said I would have to check my carry on as there was no room in the overhead bins. Another passenger helped me find a spot.

I found the staff to not be very attentive at all. When paying for Business Class you expect a certain type of service and that was not found. They were almost rude even

Not good , late, and long. We came home so late and spent so much time flying around and taxiing

Terrible. Delayed 7 hours, and cancelled the flight, leaving me stranded and out of pocket $500 for an alternative last minute flight

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

Had one staff that was not pleasant. Seems they are stressed with too many people to care for.

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

Ok. Get a different kosher caterer. The food was odd.

Food was terrible. Crew was kind but skipped over my row for providing sandwiches and beverages.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

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.

The crew was excellent as ever on Virgin. The special meal was poor unfortunately. More significantly when we arrived at Manchester Airport there was no air bridge provided and we had to exit the plane down a rickety stair case. This is unacceptable for a transatlantic flight. Whilst I understand that this is the airport’s fault at the end of the day the airline is responsible for our transportation and needs to do something.

Super friendly and helpful staff, from check-in desk to cabin crew.

Following a paid seat upgrade for enhanced comfort, I encountered an unacceptable odor in my assigned area. It took three hours for the crew to relocate me, and the replacement seat was unacceptably close to the lavatory, offering no improvement.

Good overall. Cannot fault the airlines. I have had better entertainment systems before ie ice in Emirates but it was not too bad. Food was decent and staff were friendly.

I did not fly by vergin atlantic from bangalore to vasco da gama

Your flight delayed at Heathrow n I almost missed my mother funeral.you idiots. I had to waste 10 hours in different airports. Thank your stars I'm not suing you.

Miami airport needs more thorough signage. It was a long walk from my transport point to the check in desk,

Liked the flight being almost on time (airport issues created a delay). Disliked the issue printing tag bags on the kiosk and having to wait for an hour on like to drop my bags.

Our flight was delayed for over an hour due to weather, and it had already been a long travel day. However, the crew was calm and compassionate, listening to every complaint with genuine concern. They got us home safely without incident, in spite of all of the obstacles. I’m grateful.

The flight crew was friendly and accommodating. I witnessed one of the flight attendants deal with a difficult flyer with extreme calm and compassion. I was so annoyed with the passenger and so impressed by the flight attendant. His quick action de-escalated what could have been a major incident. He was awesome.

Insulting. Lufthansa flight from Munich to EWR had us getting our luggage when we were told in Florence that it would follow us to Indianapolis. It did not. Then very slow security in EWR caused me and three other passengers from Lufthansa flight from Munich to miss the boarding closure. Behind me were two elderly grandparents and their ten year old grandson. We were all refused entry on a plane to Indy that was still at the gate. The doors had not even closed inside the terminal yet. No apologies or compensation offered. Not even a meal voucher let alone a free hotel stay for our inconvenience. I m not sure what the other three passengers behind me did ( they were elderly with a grandson, recall), but I stated 12 hours overnight in a chilly EWR airport until next flight to Indy at 850 next morning.

I was told in Florence my bag would go directly to Indianapolis. I had to wait to get it. Then security in EWR was slow so I missed my flight as United would not allow me on the plane even though it was still on the tarmac and the door to the tunnel was open. I blame both Lufthansa and United for refusing to allow me on board a plane that was clearly still on the tarmac. Behind me two grandparents and their ten year old grandson were on same flight from Munich to EWR. They were refused to board the United flight. So we had to sit for 12 hours in airport until next flight. No compensation has been offered either by Lufthansa or United.

Flight was delayed and luggage was delivered day after arrival. In Bilbao they told me day after would be delivered faster if I went to Bilbao to get my own bags so I did. Wasted my morning.

Seating was average for a first class seat. It very modern. I expected better.

very small seats screen did not work . I could not watch anything for 9 hours

The food that was served was superb!!! Awesome snacks!!! Frequent drink service!!! To me, this was shocking. I took a British Airways flight from Denver to London for the first leg of my trip and the food was horrendous. Thank you for keeping us fed and satiated on such a long flight!!!!

The seating arrangement by having privacy screens would have been more appealing. If you sit in the business class, you pay for extra comfort and privacy. Other than that, the service was excellent and the staff very professional.

Everything about the flight check-in was smooth no line the plane is clean and bathroom

Excellent everywhere but Philly, the most rotten airport in the world.

Check in was not the greatest as had to talk to an agent to clarify things and then he transferred us to another agent who had difficulty processing my credit card as there was a system glitch and not a card error.

I was put into business class. Wow! My flight attendant was great! The food amazing’

Not so good with their baggage handling as they damaged one of my check in luggage

All went well on the flight, not happy of course with having to pay for a seat and in hold luggage of £50

We never made it onto this flight due to BA's lackluster organisation.

The air hostess were good, cheerful, but I didn't like the boarding. My son and I initially bought our flight tickets, making sure it included 1 luggage and a carry on. Tickets were purchased for British airlines, but we were merged with American Airlines. At checking in our languages, we were told, we don't have luggage prepaid so we had to pay extra $125 each and almost £60 on our way back. I think that's unfair.

Economy seats are so small and compacted so close together that comfort is negatively affected, especially on long flights. However that is due to aircraft design, not anything the airline can do about it.

3/4 bags delayed and 1/4 damaged at the other end. Flight was freezing

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