HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
United Kingdom

$304+ Cheap flights from Boise (BOI) to the United Kingdom

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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LHR
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boise to United Kingdom with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Boise to United Kingdom

Cheapest flights from Boise to United Kingdom
Explore the most affordable flight options available from Boise to United Kingdom. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.

This Cheapflightsfares deal was found by Cheapflights users on 1/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/102:40 pm
BOI
-
LHR
2 stops19h 10m
Lufthansa
Tue 3/177:40 am
LHR
-
BOI
2 stops19h 49m
Lufthansa
Deal found 1/27$622
This United Airlines deal was found by Cheapflights users on 1/27. 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 2/252:40 pm
BOI
-
LHR
1 stop12h 00m
United Airlines
Tue 3/36:50 am
LHR
-
BOI
2 stops18h 57m
United Airlines
Deal found 1/27$633
This Air France deal was found by Cheapflights users on 1/27. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/245:20 am
BOI
-
LHR
1 stop18h 45m
Multiple Airlines
Tue 3/36:30 am
LHR
-
BOI
2 stops16h 45m
Multiple Airlines
Deal found 1/27$634
This United Airlines deal was found by Cheapflights users on 1/28. 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.
Sat 5/25:29 pm
BOI
-
EDI
2 stops54h 51m
United Airlines
Tue 5/129:00 am
EDI
-
BOI
2 stops41h 11m
United Airlines
Deal found 1/28$634
This Delta deal was found by Cheapflights users on 1/27. 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.
Tue 2/245:20 am
BOI
-
LHR
2 stops19h 30m
Delta
Tue 3/38:40 am
LHR
-
BOI
2 stops19h 15m
Delta
Deal found 1/27$638
This Delta deal was found by Cheapflights users on 1/28. 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 3/45:50 am
BOI
-
LHR
2 stops18h 15m
Delta
Wed 3/118:40 am
LHR
-
BOI
2 stops19h 45m
Delta
Deal found 1/28$639
This United Airlines deal was found by Cheapflights users on 1/27. 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 3/1110:49 am
BOI
-
LHR
1 stop19h 11m
United Airlines
Tue 3/176:30 am
LHR
-
BOI
2 stops21h 29m
United Airlines
Deal found 1/27$644
This Delta deal was found by Cheapflights users on 1/26. 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 4/1910:41 am
BOI
-
LHR
1 stop18h 29m
Delta
Wed 4/299:55 am
LHR
-
BOI
2 stops18h 29m
Delta
Deal found 1/26$646
This United Airlines deal was found by Cheapflights users on 1/27. 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.
Tue 4/1412:30 pm
BOI
-
LHR
1 stop15h 40m
United Airlines
Thu 4/239:00 am
LHR
-
BOI
2 stops20h 35m
United Airlines
Deal found 1/27$649
This Delta deal was found by Cheapflights users on 1/26. 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.
Sat 4/182:18 pm
BOI
-
LHR
1 stop33h 27m
Delta
Wed 4/299:55 am
LHR
-
BOI
2 stops18h 29m
Delta
Deal found 1/26$651
This Delta deal was found by Cheapflights users on 1/26. 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 4/193:44 pm
BOI
-
LHR
1 stop13h 26m
Delta
Thu 4/306:15 am
LHR
-
BOI
2 stops20h 40m
Delta
Deal found 1/26$653
This Delta deal was found by Cheapflights users on 1/26. 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.
Tue 4/2110:41 am
BOI
-
LGW
2 stops15h 44m
Delta
Tue 4/2810:35 am
LGW
-
BOI
2 stops18h 49m
Delta
Deal found 1/26$654

Find flight deals from Boise to United Kingdom

Keep the following information in mind while searching for Boise to United Kingdom flight deals. Data was last updated January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$622
(Cheapflightsfares)

One-way from

$304
(Trip.com)

Popular in

June

Cheapest in

October

Average price

$856
Provider with most accurate pricing for Boise Air Term. Gowen Fld-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-London (LON) flights.
Search Deals
From Boise Air Term. Gowen Fld to United Kingdom
Search Deals
One-way flight from Boise Air Term. Gowen Fld to United Kingdom
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($278 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($48 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boise to United Kingdom 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 January 29, 2026.
Use the filters below to find and compare flights from Boise to the United Kingdom that are best for you.

Fly from

Boise

Fly to

United Kingdom

Route

Depart

Return

Price

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 3/10

6:24 am-12:00 pm

1 stop23h 36m

London Heathrow

Tue 3/17

6:50 am-10:56 pm

2 stops22h 06m

$633

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 3/4

2:40 pm-9:40 am

1 stop12h 00m

London Heathrow

Wed 3/11

6:50 am-10:56 pm

2 stops22h 06m

$633

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 2/25

2:40 pm-9:40 am

1 stop12h 00m

London Heathrow

Tue 3/3

6:50 am-6:47 pm

2 stops18h 57m

$633

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 3/8

7:05 am-4:50 pm

1 stop27h 45m

London Heathrow

Tue 3/17

6:30 am-6:43 pm

2 stops18h 13m

$634

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Mon 3/9

10:35 am-11:55 am

1 stop19h 20m

London Heathrow

Tue 3/17

6:30 am-6:43 pm

2 stops18h 13m

$634

BoiseEdinburgh

BOI - EDI

BOIEDI

Boise Air Term. Gowen Fld

Sat 5/2

5:29 pm-7:20 am

2 stops54h 51m

Edinburgh Turnhouse

Tue 5/12

9:00 am-7:11 pm

2 stops41h 11m

$634

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 3/11

5:30 am-6:50 am

2 stops19h 20m

London Heathrow

Tue 3/17

6:30 am-6:43 pm

2 stops18h 13m

$638

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 3/4

5:50 am-7:05 am

2 stops18h 15m

London Heathrow

Wed 3/11

8:40 am-10:25 pm

2 stops19h 45m

$639

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 3/11

10:49 am-12:00 pm

1 stop19h 11m

London Heathrow

Tue 3/17

6:30 am-9:59 pm

2 stops21h 29m

$644

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 4/21

10:45 am-11:00 am

1 stop17h 15m

London Heathrow

Wed 4/29

9:55 am-9:24 pm

2 stops18h 29m

$646

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 47 results
1
2
3
...
5

Best time to book a flight from Boise to United Kingdom

Have a flexible travel schedule? Discover the best time to fly to United Kingdom 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 the United Kingdom

What is the cheapest month to book a flight from Boise to United Kingdom?

Currently, August is the cheapest month in which you can book a flight from Boise to United Kingdom (average of $618). Flying from Boise to United Kingdom in June is currently the most expensive (average of $1,085). 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.

Reviews of airlines servicing United Kingdom

Get insights into the airlines that provide service to United Kingdom. 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 United Kingdom. Reviews last updated January 29, 2026.
Read reviews from past customers who have flown Delta, Virgin Atlantic, and United Airlines from Boise to the United Kingdom. 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
7.9
Good
8,125 reviews

Comfort

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,125 reviews
Delta
7.9
Good
8,125 reviews

Comfort

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Virgin Atlantic
7.5
Good
678 reviews
Delta
7.9
Good
8,125 reviews

Comfort

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,215 reviews
Delta
7.9
Good
8,125 reviews

Comfort

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,206 reviews
Delta
7.9
Good
8,125 reviews

Comfort

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Icelandair
7.1
Good
606 reviews
Delta
7.9
Good
8,125 reviews

Comfort

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Boise to United Kingdom. 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 United Kingdom?

    If you book a flight to United Kingdom from Boise, you will be flying from Air Term. Gowen Fld, which is the city’s only airport. Boise Air Term. Gowen Fld (BOI) is located 3.3 mi from the center of Boise.

  • How long is the flight from Boise to United Kingdom?

    United Airlines, Delta, and Lufthansa can get you from Boise to United Kingdom in just under 20h 18m. Your travel time can differ by up to 7h 27m. The distance from Boise to United Kingdom is about 4843 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from Boise to United Kingdom?

    Most travelers choose Boise Air Term. Gowen Fld - London Heathrow, Boise Air Term. Gowen Fld - London Gatwick or Boise Air Term. Gowen Fld - London City when deciding on the best route from Boise to United Kingdom.

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

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

  • How can I find direct flights from Boise to United Kingdom?

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

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

    Yes. Cheapflights offers flight deals from Boise to United Kingdom 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 United Kingdom?

    Currently, August is the cheapest month in which you can book a flight from Boise to United Kingdom (average of $618). Flying from Boise to United Kingdom in June is currently the most expensive (average of $1,085). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Boise to United Kingdom

See prices for flight routes from nearby airports that may be better suited for you.
Boise to Leonardo da Vinci/Fiumicino flights
Boise to Charles de Gaulle flights
Boise to Barcelona-El Prat flights
Boise to Heathrow flights
Spokane to Heathrow flights
Spokane to Leonardo da Vinci/Fiumicino flights
Boise to Dublin flights
Spokane to Gatwick flights
Spokane to Dublin flights
Boise to Orly flights
Spokane to Charles de Gaulle flights
Boise to Gatwick flights
Spokane to Edinburgh flights
Boise to Athens flights
Boise to Lisbon flights
Boise to Zurich flights
Boise to Madrid flights
Boise to Vicenza flights
Jackson to Charles de Gaulle flights
Boise to London City flights
Spokane to Malpensa flights
Boise to Frankfurt flights
Spokane to London City flights
Spokane to Madrid flights
Boise to Amsterdam flights
Boise to Copenhagen flights
Boise to Edinburgh flights
Spokane to Amsterdam flights
Idaho Falls to Heathrow flights
Spokane to Athens flights
Spokane to Orly flights
Jackson to Leonardo da Vinci/Fiumicino flights
Boise to Malpensa flights
Spokane to Copenhagen flights
Spokane to Manchester flights
Spokane to Naples flights
Spokane to Keflavik Intl flights
Boise to Florence flights
Boise to Istanbul flights
Spokane to Prague flights
Boise to Duesseldorf Intl flights
Spokane to Istanbul flights
Boise to Linate flights
Spokane to Frankfurt flights
Spokane to Glasgow Intl flights
Spokane to Lisbon flights
Jackson to Heathrow flights
Spokane to Barcelona-El Prat flights

Top 6 airlines flying from Boise to United Kingdom

Discover the top 6 airlines that operate flights from Boise to United Kingdom. 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$577Average$774FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$604Average$944FlexibilityNo cancel feeOn-time72%
DeltaCheapest$627Average$997FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$639Average$1,033FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$703Average$1,134FlexibilityNo cancel feeOn-time71%
IcelandairCheapest$1,072Average$1,354FlexibilityNo cancel feeOn-time76%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.