BOI - LON

$399 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 5/13. 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

 
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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$644
Overall average: $751
Iberia
Tue 4/28Tue 5/5
BOI - LHR • 1 stop
Cheapest one-way
$399
United Airlines
Wed 5/13
BOI - LHR • 2 stops
Top airlines
Iberia
Cheapest • from $644 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
October
Cheapest • 31% price drop
August
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-LON)

 
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, Apr 28 - Tue, May 5
Iberia Logo
1:53 pm - 2:25 pm
BOI
-
LHR
17h 32m
1 stop
Iberia Logo
7:50 am - 9:07 pm
LHR
-
BOI
20h 17m
2 stops
$644Iberia
Sun, Apr 19 - Tue, Apr 28
United Airlines Logo
5:29 pm - 12:20 pm
BOI
-
LHR
11h 51m
1 stop
United Airlines Logo
6:55 am - 7:53 pm
LHR
-
BOI
19h 58m
2 stops
$649United Airlines
Sun, Apr 19 - Thu, Apr 30
United Airlines Logo
6:15 am - 6:30 am
BOI
-
LHR
17h 15m
2 stops
United Airlines Logo
9:00 am - 10:35 pm
LHR
-
BOI
20h 35m
2 stops
$652United Airlines
Mon, Apr 27 - Tue, May 5
Delta Logo
1:52 pm - 1:05 pm
BOI
-
LHR
16h 13m
2 stops
Delta Logo
6:30 am - 4:14 pm
LHR
-
BOI
16h 44m
2 stops
$653Delta
Tue, Apr 21 - Tue, Apr 28
United Airlines Logo
10:35 am - 10:40 am
BOI
-
LHR
17h 05m
2 stops
United Airlines Logo
7:25 am - 7:53 pm
LHR
-
BOI
19h 28m
2 stops
$654United Airlines
Mon, Apr 27 - Tue, May 5
Delta Logo
3:44 pm - 3:45 pm
BOI
-
LGW
17h 01m
2 stops
Delta Logo
10:35 am - 9:24 pm
LGW
-
BOI
17h 49m
2 stops
$660Delta
Tue, Mar 17 - Thu, Mar 26
Air France Logo
1:40 pm - 11:40 am
BOI
-
LHR
16h 00m
1 stop
Air France Logo
11:20 am - 9:35 pm
LHR
-
BOI
16h 15m
1 stop
$662Air France
Tue, Mar 17 - Thu, Mar 26
Virgin Atlantic Logo
5:30 am - 6:50 am
BOI
-
LHR
19h 20m
2 stops
Virgin Atlantic Logo
10:45 am - 11:59 pm
LHR
-
BOI
19h 14m
1 stop
$666Virgin Atlantic
Tue, Mar 3 - Tue, Mar 17
Icelandair Logo
11:54 am - 10:55 am
BOI
-
LGW
16h 01m
2 stops
Icelandair Logo
11:55 am - 10:40 pm
LGW
-
BOI
16h 45m
2 stops
$805Icelandair
Tue, Feb 24 - Tue, Mar 10
Icelandair Logo
11:54 am - 10:55 am
BOI
-
LGW
16h 01m
2 stops
Icelandair Logo
11:55 am - 10:40 pm
LGW
-
BOI
16h 45m
2 stops
$828Icelandair
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?

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 departing in April.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boise to London, 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 is October, where tickets cost $697 (return) on average. On the other hand, the most expensive months are January and June, where the average cost of round-trip tickets is $1,961 and $1,274 respectively.

Good to know

Low seasonJanuary
Cheapest flight$399
Best time to beat the crowds but there is an average 95% increase in price.
Most popular time to fly and prices are also 24% lower on average.
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 flights from Boise to London

  • What is the cheapest flight from Boise to London?

    In the last 3 days, the lowest price for a flight from Boise to London was $399 for a one-way ticket and $644 for a round-trip.

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

    Yes

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

    On your way to London, you’ll fly out from Boise Air Term. Gowen Fld. You’ll be landing in one of London’s 2 airports: London Gatwick or 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?

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

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

    The two airlines most popular with KAYAK users for flights from Boise to London are Delta and Virgin Atlantic. With an average price for the route of $979 and an overall rating of 7.9, Delta is the most popular choice. Virgin Atlantic is also a great choice for the route, with an average price of $947 and an overall rating of 7.5.

  • 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.

  • 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 3 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 8203 reviews
8.1Boarding
7.8Entertainment
7.2Food
7.9Comfort
8.5Crew
Airline reviews

Everything I mentioned earlier - the airbus was more comfortable indeed and the experience was further enhanced.

10.0 ExcellentSoosnata, Feb 2026
LAX - HNL
Read more Delta reviews

Everything I mentioned earlier - the airbus was more comfortable indeed and the experience was further enhanced.

Delta continues to set the benchmark for traveler-friendly service with minimal disruption and clear communication within the mainland US (coast to coast). I am consistently pleased to be a Delta customer, and this experience once again met my expectations. There was a brief delay departing from MIA due to a technical issue that required the aircraft to return to the gate. However, the situation was handled professionally and transparently. Fortunately, my planned layover allowed ample buffer time, so the adjustment caused no stress. Overall, another smooth and reassuring experience.

Good experience and the flight landed early. There was no food I had or entertainment.

Flight was delayed and no reasons provided. After the passengers were boarded, the crew made announcement that the captain has jot arrived and he would take another 15 mins. All passengers patiently sat until the captain came and started. Terrible experience!

Flight was delayed. No information on why it was delayed. After we boarded the flight, , the crew made announcement that the captain hs not arrived and he will take 15 mins more to arrive. Passengers were just sitting patiently for the captain to arrive and start, Terrible experience.

Totally worth the miles to upgrade to Delta Comfort. Plenty of legroom.

This was my first time flying Delta ever and I had a great experience!

Smallest leg room I've ever had on a plane.

They took all carry-on luggage from Groups 6 -9 - I was group 5 and waiting in line to board - they made me check my luggage too. That then went to baggage claim and delayed departure from the airport. There was overhead room in my seating area - Delta over reacted. Also, had a gentleman next to me that took up 1/2 my seat.

Excellent!!! Aeromexico is a great airline. What was not that good is the service provided by Kayak. It is never clear and not easy to manage.

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

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.

Entertainment kept turning itself off. Gave up on watching a movie.

Both the WIFI and entertainment did not work for 2.5h

The crew made our experience extremely bad. They were rude and didn’t have anything for kids.

Very old flight - time to retire it for newer airplanes

2+ hours delayed Outlet in row 12 did not work Tv monitors did not work Lights kept off the entire flight for at 5pm-7pm flight

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Do not like the size of the overhead bin. I think staff should monitor the size of suitcases that are being carried on by passengers to ensure they meet the size requirement.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

Both of my flights arrived early and check in process was smooth

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

Information on your arrival and departure airports