BOI - LHR

$334 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 9/15. 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
Travelers love KAYAK
41.299.237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$874
Typical prices: $810-$687
Iberia
Mon 10/19Wed 10/28
BOI - LHR • 1 stop
Cheapest one-way
$334
Delta
Tue 9/15
BOI - LHR • 2 stops
Top airlines
Cheapest • from $874 (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 $708 (round-trip)
Shortest trip • 11h 59m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 23% 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, Oct 19 - Wed, Oct 28
Iberia Logo
2:55 pm - 12:50 pm
BOI
-
LHR
14h 55m
1 stop
Iberia Logo
7:40 pm - 11:26 am
LHR
-
BOI
21h 46m
2 stops
$874Iberia
Tue, Sep 29 - Wed, Oct 7
Delta Logo
11:35 am - 11:00 am
BOI
-
LHR
16h 25m
1 stop
Delta Logo
11:45 am - 11:52 pm
LHR
-
BOI
19h 07m
2 stops
$878Delta
Tue, Sep 29 - Wed, Oct 7
Delta Logo
6:00 am - 7:10 am
BOI
-
LHR
18h 10m
2 stops
Delta Logo
6:30 am - 6:33 pm
LHR
-
BOI
19h 03m
2 stops
$882Delta
Tue, Sep 29 - Wed, Oct 7
Delta Logo
6:00 am - 7:10 am
BOI
-
LHR
18h 10m
2 stops
Delta Logo
11:45 am - 12:04 am
LHR
-
BOI
19h 19m
2 stops
$883Delta
Mon, Aug 10 - Thu, Aug 20
Delta Logo
4:05 pm - 3:35 pm
BOI
-
LHR
16h 30m
1 stop
Delta Logo
6:15 am - 3:38 pm
LHR
-
BOI
16h 23m
2 stops
$885Delta
Tue, Sep 15 - Mon, Sep 28
Scandinavian Airlines Logo
12:42 pm - 6:30 pm
BOI
-
LHR
22h 48m
2 stops
Scandinavian Airlines Logo
7:50 pm - 6:35 pm
LHR
-
BOI
29h 45m
3 stops
$886Scandinavian Airlines
Mon, Aug 10 - Thu, Aug 20
Delta Logo
11:35 am - 1:15 pm
BOI
-
LHR
18h 40m
2 stops
Delta Logo
6:15 am - 4:48 pm
LHR
-
BOI
17h 33m
2 stops
$889Delta
Mon, Aug 10 - Thu, Aug 20
Delta Logo
5:40 am - 7:10 am
BOI
-
LHR
18h 30m
2 stops
Delta Logo
6:15 am - 3:38 pm
LHR
-
BOI
16h 23m
2 stops
$890Delta
Tue, Sep 15 - Mon, Sep 28
Scandinavian Airlines Logo
12:42 pm - 6:30 pm
BOI
-
LHR
22h 48m
2 stops
Scandinavian Airlines Logo
6:40 pm - 6:35 pm
LHR
-
BOI
30h 55m
2 stops
$893Scandinavian Airlines
Tue, Sep 15 - Mon, Sep 28
Scandinavian Airlines Logo
12:42 pm - 5:40 pm
BOI
-
LHR
21h 58m
2 stops
Scandinavian Airlines Logo
7:30 pm - 6:35 pm
LHR
-
BOI
30h 05m
2 stops
$894Scandinavian Airlines
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 October.

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 $1,468 respectively.

Good to know

Low seasonJanuary
Cheapest flight$334
Best time to beat the crowds but there is an average 43% increase in price.
Most popular time to fly and prices are also 15% 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 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 $334 for a one-way ticket and $874 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?

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

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

    The two airlines most popular with KAYAK users for flights from Boise to London are Delta and United Airlines. With an average price for the route of $900 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $864 and an overall rating of 7.4.

  • 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 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 8465 reviews
7.8Entertainment
8.1Boarding
7.2Food
7.9Comfort
8.5Crew
Airline reviews

The flight was operated by Latam. The aircraft had a technical issue and the flight was delayed for the next day. They grounded other passengers to get their airplane assigned to my flight. Most of he ground staff don't speak English (Orlando Airport), but were very polite.The crew on the other hand could speak English and Portuguese. On board service was good.

6.0 GoodSilvestre, Apr 2026
MCO - GRU
Read more Delta reviews

The flight was operated by Latam. The aircraft had a technical issue and the flight was delayed for the next day. They grounded other passengers to get their airplane assigned to my flight. Most of he ground staff don't speak English (Orlando Airport), but were very polite.The crew on the other hand could speak English and Portuguese. On board service was good.

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

In ATL they have two sets of departure screens. Follow what is on your airline's departure board - the ATL Airport Authority departure board had completely incorrect details about the gate assignment for my flight, which would have made me miss boarding.

Flight was delayed it was hot while sitting on the plane, one engine was working on the plane until they had to do some jimmy rigging down the runway in order for the other engine to charge up. It was ridiculous

The flight was very good and the staff was very friendly and helpful!

The only thing I would say is we tried to get on a standby earlier flight, but with our fair we couldn’t. That seems senseless to leave with open seats..

Very easy to use and convenient, you can perform any action within the same portal

In a world of delays, Delta was on time both ways! Boarding was fast and efficient. Staff was friendly. AND wifi worked.

WiFi didn’t work. Flight delayed 3 hours Crew members were illiterate Seat lean back did not work.

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

Some crew were unfriendly or in some cases just straight up rude.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

United Airline crews were very friendly and very attentive. 12 hours flight was gone like in a shorter one.

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

Food was surprisingly delicious. Space in the seat is horrible when the seating front is reclined. Movie offerings were terrible. Crew was friendly and helpful.

Seating and zone. The minor I went with didn’t even seat close to me

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

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

Information on your arrival and departure airports