BOI - LHR

$332 Find Cheap Flights from Boise to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boise to London departing on 12/8. 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, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boise to London, 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 Boise to London, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$570
Typical prices: $749-$914
Virgin Atlantic
Tue 2/17Thu 2/26
BOI - LHR • 1 stop
Cheapest one-way
$332
Multiple Airlines
Mon 12/8
BOI - LHR • 3 stops
Top airlines
Virgin Atlantic
Cheapest • from $570 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
April
Cheapest • 15% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Boise to London (BOI-LHR)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boise to London 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 round-trip flight deals from Boise to London

Tue, Feb 17 - Thu, Feb 26
Virgin Atlantic Logo
6:00 pm - 12:50 pmBOI-LHR
11h 50m1 stop
Virgin Atlantic Logo
12:20 pm - 11:58 pmLHR-BOI
18h 38m1 stop
$570Virgin Atlantic
Find Deal
Tue, Dec 2 - Tue, Dec 9
Virgin Atlantic Logo
5:35 am - 7:05 amBOI-LHR
18h 30m1 stop
Virgin Atlantic Logo
6:20 am - 6:51 pmLHR-BOI
19h 31m2 stops
$592Virgin Atlantic
Find Deal
Wed, Nov 19 - Wed, Nov 26
Delta Logo
11:42 am - 10:30 amBOI-LHR
15h 48m1 stop
Delta Logo
8:40 am - 10:27 pmLHR-BOI
20h 47m2 stops
$593Delta
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Wed, Nov 19 - Wed, Nov 26
Delta Logo
8:45 am - 10:15 amBOI-LHR
18h 30m2 stops
Delta Logo
8:40 am - 10:27 pmLHR-BOI
20h 47m2 stops
$598Delta
Find Deal
Tue, Feb 17 - Tue, Feb 24
Multiple Airlines Logo
1:43 pm - 11:40 amBOI-LHR
14h 57m1 stop
Multiple Airlines Logo
6:20 am - 4:26 pmLHR-BOI
17h 06m2 stops
$600Multiple Airlines
Find Deal
Tue, Feb 17 - Fri, Feb 27
KLM Logo
11:45 am - 10:00 amBOI-LHR
15h 15m1 stop
KLM Logo
11:20 am - 11:04 pmLHR-BOI
18h 44m1 stop
$607KLM
Find Deal
Tue, Feb 17 - Thu, Feb 26
United Airlines Logo
10:53 am - 12:00 pmBOI-LHR
18h 07m1 stop
United Airlines Logo
6:35 am - 11:48 pmLHR-BOI
24h 13m2 stops
$617United Airlines
Find Deal
Mon, Dec 1 - Mon, Dec 8
KLM Logo
11:42 am - 10:30 amBOI-LHR
15h 48m1 stop
KLM Logo
6:30 am - 4:02 pmLHR-BOI
16h 32m2 stops
$621KLM
Find Deal
Tue, Feb 17 - Fri, Feb 27
United Airlines Logo
10:53 am - 7:25 amBOI-LHR
13h 32m1 stop
United Airlines Logo
6:35 am - 11:48 pmLHR-BOI
24h 13m2 stops
$626United Airlines
Find Deal
Thu, Nov 13 - Wed, Nov 19
Multiple Airlines Logo
6:20 am - 7:10 amBOI-LHR
17h 50m2 stops
Multiple Airlines Logo
6:35 am - 6:09 pmLHR-BOI
18h 34m2 stops
$659Multiple Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Boise to London flights

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

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

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Boise to London Heathrow Airport departing in February.

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

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

For Boise to London, Tuesday is the cheapest day to fly on average and Friday is the most expensive. Flying from London back to Boise, the best deals are generally found on Thursday, with Sunday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boise to London Heathrow Airport, 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 Boise to London Heathrow Airport is April, where tickets cost $801 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,409 and $1,136 respectively.

How far in advance should I book a flight from Boise to London Heathrow Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Boise to London Heathrow Airport, 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 the flight from Boise to London Heathrow Airport, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 1 week before departure.

Good to know

Low seasonJanuary
Cheapest flight$332
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from Boise to London

When to book flights from Boise to London

Are your dates flexible? Find out the best times to travel from Boise to London based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Boise to London flights

  • What is the cheapest flight from Boise to London Heathrow Airport?

    In the last 3 days, the lowest price for a flight from Boise to London Heathrow Airport was $332 for a one-way ticket and $570 for a round-trip.

  • Do I need a passport to fly between Boise and London?

    A passport is required to fly from Boise to London.

  • Which airports will I be using when flying from Boise to London?

    When flying out of Boise you will be using Boise Air Term. Gowen Fld. You will be landing at London, also known as London Heathrow.

  • Which aircraft models fly most regularly from Boise to London?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Boise to London?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Boise and London, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Boise to London, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from Boise to London are Delta and KLM. With an average price for the route of $1,057 and an overall rating of 7.9, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $774 and an overall rating of 7.7.

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

    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 Boise to London.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Boise 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 Boise to London?

    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 London with an airline and back to Boise with another airline. Booking your flights between Boise and LHR can sometimes prove cheaper using this method.

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

    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 London from Boise up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Boise to London

 
See real verified KAYAK customer reviews for airlines flying from Boise to London. 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 Boise to London? 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.
7.9
DeltaOverall score based on 7993 reviews
7.9Comfort
7.9Entertainment
7.3Food
8.5Crew
8.2Boarding
Airline reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

8.0 ExcellentJulie, Oct 2025LAX - SFO
Read more Delta reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

The aircraft interior is old and tired on this aircraft. The entertainment system never worked despite the crews attempt to reset the system.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Old plane and old configuration/seats but still comfortable for a morning flight

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

Flight was crowded and the woman sitting on my left was large & kept crouching in to my space. You need bigger seats or smaller passengers to fit into the seats you DO have! Snack were OK. Would appreciate if airlines had more savory rather than sweet snacks, thank you!

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

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

Couldn’t get boarding pass in SLC even with help from a redcoat, so had to find a desk in AMS to get boarding pass. Technical problems so not sure why. Very inconvenient. The KLM app is not as user friendly as most apps. Also had to wait almost an hour on the tarmac for a fuel truck, which caused us to miss a connecting bus in LUX.

The immigration hall in Amsterdam was understaffed, so passport checking was slower than it should be for a major airport. They need to get the automatic readers up and running for non EU passport holders. Waiting in line after a long flight feels a bit abusive.

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.

First of all we couldn’t check in online, then we learn at the airport we were on stand by for KLM’s mistake of overbooking. The seats were not comfy at all. Our luggage got lost.

Ad experience - been flying many years with them but they are losing out to other carriers with their service and bagage / seating policy. My 2 12-yo kids were not placed with the parent. Absurdity.

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

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!

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.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

The person I bought the ticket for didn’t make the flight.

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

After boarding the plane in Chicago, the passengers were told that there was a technical problem with the plane. Passengers remained on the plane as they tried to fix the problem. After what was probably an hour passengers were told that there was a need to change planes as the problem was not solved. Passengers disembarked and boarded another plane. After taxing to the runway and waiting for takeoff, passengers were told that owing to the thunderstorm the flight was unable to take off but would try and reroute. After some time passengers were told there wasn't enough fuel for the new route and the plane had to return to the gate for additional fuel. after another log delay the flight got underway. On the plane there was food, drinks, ice or entertainment. We were a glass of water, which appeared rationed. Flight arrived about 5 hours late. The pilot was fantastic and communicated with the passengers throughout the ordeal.

Same as last comment. Food sucks. Quality. Not surprising most people have no clue about nourishment Clearly

Not the fault of United—weather, reroute around weather, time sitting on tarmac, arrived couple hours late, too late for train into city necessitating a much pricier cab but weather…can’t be helped.

Friendly and professional flight crew. Aside from departure delay after boarding, easy flight and smooth landing.

Great smooth flight. Had a seating change, but that was an improvement. Thanks United Airways Crew.

Disliked having to wait a little longer to disembark from the plan when we landed in London

Food should be better quality. Video screens have poor resolution and the library of movies is poor. The other airlines are much better.

The trip was smooth but the crew were very abrupt, snatching things before finished and being quite snappy when asked questions.

My wife and I love to travel, so we fly a lot. We've already logged 381,075 miles and with practically every major airline. But this flight was very disappointing. It started off well, with no delays and a new plane. But when lunchtime approached, all that good impression was ruined. Instead of white tablecloths, we were offered small, dark placemats, which, as it turned out, were perfectly adequate for the food. All the food offered—and my wife and I only took fish, and the meat—was not just bad, it was downright disgusting and not heated enough. The same applies to the appetizers. This was the first time in many years of traveling that we've been offered such disgusting food.

Lost luggage stuck no clothes and no word after 2 days leaving on cruise no stuff or clothes

Don’t know they cancelled the flight day before I was to leave. They sent a email at 9:00 pm at night saying they cancelled. That is the smooth way to say we don’t want your business! I think they didn’t have enough people booking so they cancelled the flight! It’s all about the money anymore there is no honesty in business.

The flight was canceled 3 hours after original take off time

Pathetic check in experience at JFK. Everything is self check in. Not enough staff present to help with when the check in process or the kiosk gets stuck. Staff present not welcoming or pleasant at all. On the other hand the NY based flight crew was great. Courteous and friendly throughout the flight. Special meals leave a lot to be desired. Kids meals should be made available when kids are flying and same goes for special kids meals too.

Flight was full, and would have preferred an aisle seat, but due to getting a late ticket ,the seat I had was adequate. The flight crew were very help full and hard working. Food and drink were excellent for the 11hr flight. Overall I was pleased with flight, and would recommend British Airways again.

More choices on menu. Seemed only thing offered was Scottish, and while that’s good for the Scot’s it doesn’t help the Americans who don’t like that food. And I really hate it when, during sleep time the attendants have a very loud conversation right over you. Lastly, I paid 5000 dollars for business class, and having to pay more to choose my seat early is really an insult. Seems greedy

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

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