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$312+ Cheap flights from Boise (BOI) to Heathrow (LHR)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LHR
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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Cheapflights Tip: The best prices from Boise Air Term. Gowen Fld to London Heathrow are usually found in October or August, booked 8 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Cheap flight deals from Boise to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Boise (BOI) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 18, 2025.

Round-trip from

$699
(Scandinavian Airlines)

One-way from

$312
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$807
From Boise Air Term. Gowen Fld to London Heathrow
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One-way flight from Boise Air Term. Gowen Fld to London Heathrow
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Highest demand for flights based on searches. 18% potential increase in price ($214 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($43 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Boise to Heathrow

Cheapest flights from Boise to Heathrow
Explore the most affordable flight options available from Boise to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

This Iberia deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/147:00 amBOI - LHR
1 stop16h 25mIberia
Wed 10/810:30 amLHR - BOI
1 stop18h 52mIberia
Deal found 8/18$631
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/145:45 amBOI - LHR
1 stop22h 35mDelta
Wed 10/86:15 amLHR - BOI
2 stops16h 51mDelta
Deal found 8/18$633
This Iberia deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/247:00 amBOI - LHR
1 stop24h 25mIberia
Sun 10/58:20 amLHR - BOI
1 stop20h 25mIberia
Deal found 8/18$681
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/243:45 pmBOI - LHR
1 stop18h 30mDelta
Sun 10/56:15 amLHR - BOI
2 stops16h 25mDelta
Deal found 8/18$683
This Scandinavian Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/13:45 pmBOI - LHR
2 stops22h 55mScandinavian Airlines
Wed 10/86:40 amLHR - BOI
2 stops23h 12mScandinavian Airlines
Deal found 8/17$699
This FlightHub deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/123:05 pmBOI - LHR
2 stops20h 25mScandinavian Airlines
Tue 11/1810:20 amLHR - BOI
2 stops19h 44mScandinavian Airlines
Deal found 8/16$708
This United Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1212:35 pmBOI - LHR
1 stop15h 40mUnited Airlines
Tue 11/181:25 pmLHR - BOI
2 stops29h 14mUnited Airlines
Deal found 8/16$728

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boise to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 18, 2025.
Use the filters below to find and compare flights from Boise to London Heathrow Airport that are best for you.

Fly from

Boise

Fly to

Heathrow

Route

Depart

Return

Price

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 9/14

7:00 am-6:25 am

1 stop16h 25m

London Heathrow

Wed 10/8

10:30 am-10:22 pm

1 stop18h 52m

$631

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 9/14

5:45 am-11:20 am

1 stop22h 35m

London Heathrow

Wed 10/8

6:15 am-4:06 pm

2 stops16h 51m

$633

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 9/24

7:00 am-2:25 pm

1 stop24h 25m

London Heathrow

Sun 10/5

8:20 am-9:45 pm

1 stop20h 25m

$681

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 9/24

3:45 pm-5:15 pm

1 stop18h 30m

London Heathrow

Sun 10/5

6:15 am-3:40 pm

2 stops16h 25m

$683

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 10/1

8:10 am-10:00 am

1 stop18h 50m

London Heathrow

Wed 10/8

9:55 am-11:15 pm

2 stops20h 20m

$699

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 10/1

3:45 pm-9:40 pm

2 stops22h 55m

London Heathrow

Wed 10/8

6:40 am-10:52 pm

2 stops23h 12m

$699

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 11/12

3:05 pm-6:30 pm

2 stops20h 25m

London Heathrow

Tue 11/18

10:20 am-11:04 pm

2 stops19h 44m

$708

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Fri 10/3

9:26 pm-5:45 pm

3 stops37h 19m

$312

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 2/11

8:40 am-7:10 am

2 stops15h 30m

$459

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 2/11

12:29 pm-7:55 am

1 stop12h 26m

$463

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 12 results
1
2

Best time to book a flight from Boise to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Boise with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boise to London Heathrow Airport

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

Use this chart to determine the optimal time to book a round-trip flight from Boise to Heathrow. Price data was last updated on August 8, 2025.

To ensure you get the cheapest price possible for a flight from Boise to London Heathrow Airport, you should look to book at least 7 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Boise to London Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from Boise to London Heathrow Airport (average of $661). Flying from Boise to London Heathrow Airport in June is currently the most expensive (average of $1,097). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BOI to LHR?

Find hourly flight availability from Boise to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 18, 2025.

A simple way to save on the total cost of your ticket is to fly from Boise to London Heathrow Airport in the evening. If you’re flexible enough to do this you can expect to save up to 12% on your trip compared to booking a flight in the morning.

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

Use this chart to determine the cheapest time to fly round-trip from Boise to Heathrow. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Boise to London Heathrow Airport flight should consider departing on Wednesday evenings when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated August 18, 2025.
Read reviews from past customers who have flown Delta, KLM, and United Airlines from Boise to London Heathrow Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,385 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,925 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Virgin Atlantic
7.4
Good
657 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Boise to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Boise to London Heathrow?

    Located just 3.3 mi from the city center, Boise Air Term. Gowen Fld is the airport most travelers will use when flying to London Heathrow from Boise. Booking flights from Air Term. Gowen Fld (BOI) to London Heathrow should be relatively easy as there are 0 daily outbound flights to London Heathrow from 5 different airlines.

  • How long is the flight from Boise to London Heathrow Airport?

    A quick flight from Boise to London Heathrow Airport can take about 16h 25m. Iberia provides one of the quickest options available for as low as $631. The distance between Boise and London Heathrow Airport is about 4829 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Boise to London Heathrow Airport round-trip?

    Our cheapest airline available from Boise to London Heathrow Airport is KLM. Our recent data shows that you can find tickets from as low as $577 on this airline. Additional options worth looking into are United Airlines and Virgin Atlantic, starting at $685 and $695 round-trip. KLM is priced at 38% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Boise to Heathrow that include hotel bookings?

    Yes. In addition to deals on Boise to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boise to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boise to Heathrow.

  • Can I find deals for business class flights from Boise to Heathrow?

    Yes. Cheapflights offers flight deals from Boise to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, November is the cheapest month in which you can book a flight from Boise to London Heathrow Airport (average of $661). Flying from Boise to London Heathrow Airport in June is currently the most expensive (average of $1,097). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Harrow
Canterbury
Dartford
Dover
Stratford-upon-Avon
Orpington
Watford
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Chelmsford
Southend-on-Sea
Folkestone
Chichester
Swindon

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Boise to Heathrow

Discover the top 5 airlines that operate flights from Boise to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$577Average$774FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$685Average$929FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$695Average$977FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$703Average$873FlexibilityNo cancel feeOn-time71%
DeltaCheapest$727Average$1,083FlexibilityNo cancel feeOn-timeN/A

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