BOI - LHR

$284 Find Cheap Flights from Boise to London Heathrow Airport

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 5/9. 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 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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$846
Typical prices: $736-$966
Iberia
Mon 4/13Mon 4/20
BOI - LHR • 1 stop
Cheapest one-way
$381
Multiple Airlines
Sat 5/9
BOI - LHR • 3 stops
Top airlines
Cheapest • from $846 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Boise and London. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $697 (round-trip)
Shortest trip • 12h 00m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 21% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to London!
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

Mon, Apr 13 - Mon, Apr 20
Iberia Logo
1:53 pm - 12:10 pm
BOI
-
LHR
15h 17m
1 stop
Iberia Logo
7:25 pm - 9:07 pm
LHR
-
BOI
32h 42m
2 stops
$846Iberia
Sun, Apr 12 - Tue, Apr 28
American Airlines Logo
1:29 pm - 10:30 am
BOI
-
LHR
14h 01m
1 stop
American Airlines Logo
10:05 am - 10:38 pm
LHR
-
BOI
19h 33m
1 stop
$851American Airlines
Wed, Apr 29 - Tue, May 12
Finnair Logo
1:29 pm - 10:30 am
BOI
-
LHR
14h 01m
1 stop
Finnair Logo
8:55 am - 10:38 pm
LHR
-
BOI
20h 43m
1 stop
$865Finnair
Mon, Apr 13 - Tue, Apr 28
Finnair Logo
1:29 pm - 10:30 am
BOI
-
LHR
14h 01m
1 stop
Finnair Logo
10:05 am - 10:38 pm
LHR
-
BOI
19h 33m
1 stop
$866Finnair
Tue, Apr 28 - Tue, May 5
Iberia Logo
1:53 pm - 6:15 pm
BOI
-
LHR
21h 22m
2 stops
Iberia Logo
12:55 pm - 9:07 pm
LHR
-
BOI
15h 12m
1 stop
$874Iberia
Mon, Apr 13 - Tue, Apr 28
Iberia Logo
1:53 pm - 6:15 pm
BOI
-
LHR
21h 22m
2 stops
Iberia Logo
10:05 am - 9:07 pm
LHR
-
BOI
18h 02m
1 stop
$875Iberia
Tue, Apr 14 - Tue, Apr 21
Iberia Logo
6:00 am - 8:05 am
BOI
-
LHR
19h 05m
1 stop
Iberia Logo
7:50 am - 9:07 pm
LHR
-
BOI
20h 17m
2 stops
$880Iberia
Tue, Apr 21 - Mon, Apr 27
Iberia Logo
1:41 pm - 12:10 pm
BOI
-
LHR
15h 29m
1 stop
Iberia Logo
7:50 am - 9:07 pm
LHR
-
BOI
20h 17m
2 stops
$886Iberia
Sun, Apr 12 - Tue, Apr 28
Iberia Logo
6:00 am - 12:10 pm
BOI
-
LHR
23h 10m
1 stop
Iberia Logo
2:25 pm - 10:38 pm
LHR
-
BOI
15h 13m
1 stop
$888Iberia
Thu, Apr 30 - Thu, May 7
Iberia Logo
1:41 pm - 12:10 pm
BOI
-
LHR
15h 29m
1 stop
Iberia Logo
12:55 pm - 9:07 pm
LHR
-
BOI
15h 12m
1 stop
$890Iberia
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 April.

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 August, where tickets cost $797 (return) on average. On the other hand, the most expensive months are January and June, where the average cost of round-trip tickets is $1,487 and $1,296 respectively.

Good to know

Low seasonJanuary
Cheapest flight$381
Best time to beat the crowds but there is an average 47% increase in price.
Most popular time to fly with an average 10% increase in price.
Flight from Boise to London Heathrow Airport

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 Heathrow Airport 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 $381 for a one-way ticket and $846 for a round-trip.

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

    A passport is required to fly from Boise to London Heathrow Airport.

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

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

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

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

  • Which airline alliances offer flights from Boise to London Heathrow Airport?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Boise and London Heathrow Airport, 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 $955 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 7.8.

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

    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 Heathrow Airport.

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

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

    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 Heathrow Airport 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 Heathrow Airport?

    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 Heathrow Airport 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 8286 reviews
8.1Boarding
7.9Comfort
7.2Food
8.5Crew
7.8Entertainment
Airline reviews

Perhaps when you’re sitting in 1st class and the crew closes the bathroom for the pilots, there could be a notification other than holding your hands up as a blockade when you get there and you’re told the restrooms are closed please turn around … especially at night when visibility is poor and you’re met by a flight attendants with their arms up

10.0 ExcellentDebra, Mar 2026
PBI - ATL
Read more Delta reviews

Perhaps when you’re sitting in 1st class and the crew closes the bathroom for the pilots, there could be a notification other than holding your hands up as a blockade when you get there and you’re told the restrooms are closed please turn around … especially at night when visibility is poor and you’re met by a flight attendants with their arms up

First class is comfortable. Enjoyed a movie and was able to relax compared to coach.

Loved flying First Class. Very comfortable. The seat was amazing. Enjoyed a movie and was able to relax so much better than in coach.

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

The WiFi was not working. That made for a long flight.

With Aeromexico it ended up good but with Delta it was bad because we did everything through Delta... Showed up at the Delta terminal... It was the wrong place! Nothing ever told us to go to the Aeromexico terminal. It said "in partnership with Aeromexico" but I was never instructed to check in with them or go to their terminal. We had to haul @$$ running through the airport and almost didn't make it thanks to this poor communication. 👎🏽

Absolutely no communication on why there's a delay and multiple flight time reschedules. I would have canceled the flight and drove back home if I known it was going to be rescheduled 3 or 4 times.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

Crew is not the cheerful type. very slow meal service (this is their style as have flown this many times)

Empty seats next to me - wish it had been for a longer flight!!

I’m grateful for the KLM Air France shuttle bus service to Ottawa. However due to construction and other issues related to the chaotic Uber pickup system at YUL, it’s a challenge to find the Kelios bus service to Ottawa. The signs are not clear or even available. No staff to guide passengers. It’s a stressful experience.

Delay and had to run between flight to get my connection due to this delay but besides that the overall experience was ok. I arrived with just an hour of delay.

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.

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.

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

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

OK, we were delayed and had to de plane and reboard.

United is one airline which regardless of how many separate United tickets in existence, if one flight breaks down, the airline will take care of all the flights.

Both our flights were delayed. Almost didn’t get in the second flight. Staff was rude to the bone.

Both my flight where delayed Had 25min to make it to my transfer flight

Everything was on time and service on the flight was great!

Wifi Bluetooth features for watching in flight movie was horrible. Screen kept blacking out no connection of sound although it said connected. Other than that smooth trip .

The 777’s economy seat’s legroom was more tolerable than expected. I appreciate the reclining mechanism which slides the seat forward to minimize cannibalizing the space behind. The food was terrible: very salty.

The travel company that you have on your site did me so wrong. I don’t know how it happened, but they put my son‘s name on my plane ticket flying to Vietnam. Along with his birthday. They would not have let me fly from Fort Myers to Ho Chi Minh City. I don’t think that I can ever use your service again. I typed my information into the browser along with my passport number and four days before I’m leaving I have to quickly search another ticket to fly out here.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

Good level of service. Comfortable airplane. However, security is always a hassle at LHR. I always try to avoid that airport at all cost if possible.

Everything smooth. The only thing is that my connecting flight in the US to my final destination was delayed. The time changed 4 times. For the rest, everything on time without issues

My flight to London from Philadelphia was cancelled due to weather.

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

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

Information on your arrival and departure airports