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Find cheap flights from London Heathrow Airport to Idaho from $640

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 9/12. 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
0 bags
Mon 6/3
Mon 6/10

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Best Idaho Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Boise
Boise2 stops$747
Idaho Falls
Idaho Falls2 stops$803

Good to know

Low season

March

High season

May

Cheapest flight

$640
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 2% lower on average.
Flight from London to Boise

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 to Idaho from London Heathrow Airport is likely to change within 7 days, so travelers 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 round-trip ticket. You could then fly to Idaho with an airline and back to London Heathrow Airport 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 to Idaho from London Heathrow Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Idaho

  • Morning departure is around 13% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from Heathrow to Idaho

 
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.
8.2
Singapore AirlinesOverall score based on 1465 reviews
8.4Boarding
8.1Comfort
7.8Food
8.2Entertainment
8.7Crew
Airline reviews

My overall experience with Singapore Airlines is great. Will definitely fly Singapore airline again.

8.0 ExcellentAnonymous, Apr 2024SIN - JFK
Read more about Singapore Airlines reviews

My overall experience with Singapore Airlines is great. Will definitely fly Singapore airline again.

When boarding, after business class should be premium economy, but economy class already lined-up at the gate blocking premium economy to board. Singapore airline crew should done a better job to organize this chaos :( Thank you.

It seems paying premium economy does not make difference with economy. No priority boarding, not worthy paying extra$$$ for premium economy.

A pc of cake or biscuit at least. The airport was like a maze need to take another bus to the main terminal to immigration.

Perfect experience from boarding through to leaving the flight, comfortable and personalised service from all staff, highly recommended

They were able to assist my elderly father and myself after not being able to check in to scoot. The counter service was phenomenal. They did what they could to get us on the next plane so we could catch our Connecting flight. Scoot closed early on us so we ended up missing our flight.

They close their counter so early. I had internet issues so I couldn’t check In online . I would have made the flight but their counter was closed 5 minutes before we arrived. No way of contacting them even though I had the confirmation number and tried to check in the night before on someone else’s phone. I tried calling their customer service with no pick up. Horrible experience, I’m very unhappy with them. I hope to never fly with them ever again. It costed me almost $900.

They are great with every aspect of customer service. Helped my elderly father and aided him with using the restroom.

Even though it was a very full flight, the service was still excellent, the plane did not feel too cramped and cabin crew made a sincere effort to help passengers find overhead space for stowing luggage.

Due to the delay of my first flight, my connecting flight with JetBlue was canceled by Singapore Airlines, but the JetBlue crew was very accommodating and rebooked a seat for me. The crew was very nice and had good attitude.

Wuhan - Dubai. Old plane: 1. Only USB charger. No power outlet to plug in.. 2. Super narrow seat layout 3. Toilet cover consistently fell down and hit my back when sitting on it.. :( 4. Entertainment system touch screen not sensitive, and need to press hard or use finger tips to hit. Crew were very nice and accommodating though.

1. I got very poor check in experience with the counter lady . This is the first airline I ever experienced that no combine check in weight allow . Even we have 4 of us but weight counter by piece . So we wasted lot of time argue and repack . This is super crazy 2. Next I left my Samsung tablet on the plane . And I started to escalate and finally spoke to southern airline lost and found in Malaysia and the amazing answer she give is : system nothing found and please try to call southern airline in china 🧐 . I have been flying many other airlines but this is my first encounterment with such irresponsible airline response and no empathy given to customer . My feeling is nobody bother whether how customer like me feel and I’m just too small for the management to take note .

No red vine, no whiskey, no vodka. No that I wanted all of them at once but still...

During flight, some passengers perform stomping leg exercises which disturb the comfort (I.e. sleep) of other passengers.

No good but was short flight. Both of our China Southern flights were on time. No surprises.

The flight was okay it was the kayak customer service that was poor, I have been trying to change my name on my flight ticket 3 days before my flight and nothing got done about it even tho I messaged so many times and phoned, all I got in return was that is was being processed and still to this day nothing has been done about it, I think it’s disgusting and un needed stress to the trip.

The food was perfect. The boarding process is a bit long. Given the late boarding time, I felt very tired by the time I was seated.

Quality flight from start to finish. Customer service is evidently very important to this company. The staff really exceeded expectations.

Traveling with the Chinese airlines , their service superior to the US Airlines , they are much more friendly and the seats are comfortable , In the past I flew with United , now ,United Airline will become history for me .

Pros: "Yes, seats were very comfortable and crew members were extremely helpful"
Cons: "Everything was excellent."

Very comfortable Prem economy seats for a long haul flight. Had a problem with the tv that the crew fixed so was great!

I cancelled the flights in good time but could only get a partial refund. I was not warned of this.

Not good. Flight was purchased for my father who needed medical assistance to board and transfer due to a heart condition. No one at Hong Kong from Cathay was there to assist and he barely made the connection. When I talked to him he could barely breath and was not sure he was going to make it. Really poor service even though the ticket stated he needed a wheelchair assistance.

The boarding experience was as expected and went well. The plane's economy seating plan is not designed for a positive customer experience but rather for company profit. When the passenger in front of me reclined, the distance from the screen to my face was the span of my hand (thumb tip to pinky fingertip). There is no such thing as personal space in this setting. This results in the domino effect, for when I recline the person in back of me reclines and so it goes. This is not to say that reclining is the answer as the experience is not increased, but simply managed.

we were upgraded which was a blessing and tender mercy for us. I fell the day before and was in extreme pain from knee to shoulder. Sitting in a more comfortable seat during the flight was an unexpected blessing and experience.

The coffee in Premium economy and economy is terrible. That's it. Everything else is great

Very comfortable flights. Not so many new releases in terms of films.

I felt thirsty and asked the flight attendent for water, but no one came for more than half an hour.

Everything went smooth. All flights were on time No changing gates, . No changing flights . It was like a completely different airlines tha n the last time I used Cathay Pacific . The last flight, 2 months ago, I had before this one was from Philippines also . I got changed in Manila and was told it only added 2 hours onto my flight . My 20 hour return trip ended up being 30 hours return with a 10.0 hour layover in New York with no seats anywhere . Everyone was sleeping or sitting on the floor . Unlike the hotel I was given in Manila to wait for this flight home . I never thought I would use Cathay Pacific again . But I did and this time you were great! I should have complained about the flight and layover from Hell a couple months ago. Consider that I am complaining about that august/23 flight now . Thank you got the great flying experience on my way home from philippines .

Everything was good food could be better but ok for economy on my 2nd flight the head ph jack are bad you have to hold pushed in to hear anything but other then that very nice service

On the flight back the seats where very uncomfortable, they where so bad that my back started to hurt after the first 2 hours. I can sit in a wooden chair for 2 hours. But these where just horrible, it just shows how cheap the airline has become. And the cabin was heated all those people in a heated cabin during a night flight. It was clear the climate control was not working. To top that off you are not even offered a glass of water, these people are animals.

We purchased a Go First Pass for 10 Euros each so we could board first, but everyone was able to board at the same time so we wasted 20 Euros. The flight left ab out 15 minutes late and was not allowed to land at Healthrow so we had to circle Heathrow for about 45 minutes. This caused us to almost miss our flight from Heathrow to Atlanta.

Severely delayed with no notice. Could have arrived at the airport hours later had we been informed of the delay

Once the boarding sign went on and all passengers gathered in line, we were left waiting standing up for almost an hour because there was a delay.

It would be nice to have vegan options for meals. The entertainment was not working on the the way to Austria. It was only available near the end of flight to Canada. The service was excellent.

Flight was delayed by approx 1 hour. The boarding process and the flight itself were very good, slightly tight squeeze for my legs but overall happy.

The business class layout on this plane is tightly packed and atrocious with no sense of privacy.

Flight was meant to leave at 8:30pm but there was a 2 hour delay 😞

Airmalta does not include meals in their flights and neither offers entertainment.

Pros: "The crew was amazing and took measures to make the flight Covid safe"
Cons: "The food was not the best and Twistees weren't available. Also the seats felt narrow"

my original flight was cancelled the previous day, and i was rescheduled onto this flight, which left much earlier in the morning, impacting my previous evening and requiring me to get up much earlier in the morning to get to the airport online. This practice happens way way way too much, and it seems on every airline, though AA is probably the worst.

The crew was very attentive and kept busy serving a variety of treats!

Offered vegetable curry when it was actually tofu which I don’t care for.

The flight was good the crew excellent…but take off delayed three hours!!!

Both mine and my husband's chairs were broken. Also it took 2 hours to get our bags after our flight which was wild.

perhaps eye contact with the cabin crew, instead of abruptness and an impatience to serve.

Not enough trash pickups throughout the flight. Everything else was great.

Overall good, the gluten free food is very hit/miss though and you must tell them you have an allergy days in advance.

All was good. The headphones they supply are of poor quality. The food is good but too much dairy.

Seating space was crowded and I am a very small woman.

Book cheap flights from London to Idaho

Recent round-trip flight deals

5/29Wed
2 stopsFinnair
23h 01mLHR-GEG
6/18Tue
2 stopsFinnair
18h 16mGEG-LHR
$700
5/28Tue
1 stopFinnair
37h 36mLHR-GEG
6/18Tue
2 stopsFinnair
34h 21mGEG-LHR
$726
9/20Fri
2 stopsUnited Airlines
16h 35mLHR-BOI
9/23Mon
1 stopUnited Airlines
16h 05mBOI-LHR
$747
9/25Wed
2 stopsAmerican Airlines
19h 13mLHR-GEG
9/28Sat
2 stopsAmerican Airlines
25h 21mGEG-LHR
$812
9/25Wed
1 stopAmerican Airlines
17h 58mLHR-GEG
9/28Sat
2 stopsAmerican Airlines
23h 05mGEG-LHR
$814
10/15Tue
1 stopLufthansa
18h 40mLHR-GEG
10/25Fri
1 stopLufthansa
12h 08mGEG-LHR
$887
9/25Wed
1 stopBritish Airways
12h 20mLHR-GEG
9/28Sat
1 stopBritish Airways
31h 10mGEG-LHR
$976
8/29Thu
1 stopLufthansa
18h 00mLHR-BOI
9/19Thu
1 stopLufthansa
16h 17mBOI-LHR
$1,848
5/16Thu
1 stopBritish Airways
12h 32mLHR-GEG
6/4Tue
1 stopBritish Airways
11h 46mGEG-LHR
$8,445
5/14Tue
2 stopsAir France
16h 44mLHR-GEG
6/6Thu
1 stopAir France
16h 30mGEG-LHR
$10,217

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Recent one-way flight deals

9/12Thu
2 stopsIcelandair
16h 14mLHR-BOI
$640
9/12Thu
2 stopsIcelandair
16h 14mLHR-BOI
$667
9/12Thu
1 stopBritish Airways
17h 20mLHR-BOI
$767
7/22Mon
2 stopsIcelandair
31h 30mLHR-BOI
$769
9/12Thu
3 stops
35h 10mLHR-BOI
$839
9/12Thu
3 stops
35h 10mLHR-BOI
$842
9/12Thu
1 stopBritish Airways
14h 03mLHR-BOI
$1,064
10/26Sat
1 stopKLM
14h 17mLHR-IDA
$1,644
7/22Mon
1 stopKLM
21h 33mLHR-BOI
$1,936
7/21Sun
1 stopAir France
13h 05mLHR-BOI
$1,989

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Last minute flights from Heathrow to Idaho

Last minute flight, train and bus deals

5/7Tue
multi-stopIcelandair
32h 02mLHR-BOI
5/14Tue
multi-stopIcelandair
22h 20mBOI-LHR
$1,109
5/7Tue
multi-stopUnited Airlines
28h 54mLHR-BOI
5/14Tue
multi-stopUnited Airlines
21h 40mBOI-LHR
$1,273
5/7Tue
multi-stopUnited Airlines
18h 59mLHR-BOI
5/14Tue
multi-stopUnited Airlines
13h 27mBOI-LHR
$1,289
5/7Tue
multi-stop
20h 15mLHR-BOI
5/14Tue
multi-stop
18h 14mBOI-LHR
$1,300
5/7Tue
multi-stopAir Canada
19h 54mLHR-BOI
5/14Tue
multi-stopAir Canada
18h 14mBOI-LHR
$1,305

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London Heathrow Airport - Idaho Flights

Departure:

London Heathrow Airport (LHR)United Kingdom

Return flight deals:

Idaho - London Heathrow Airport

Cabin classes: