HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
United Kingdom

$329+ Cheap flights from Idaho 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 3/29. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LHR
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Idaho 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 Idaho to United Kingdom

Cheapest flights from Idaho to United Kingdom
Explore the most affordable flight options available from Idaho to United Kingdom. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 28, 2026.

This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/2412:38 pm
GEG
-
LHR
2 stops22h 57m
Lufthansa
Tue 3/106:35 am
LHR
-
GEG
2 stops21h 43m
Lufthansa
Deal found 1/26$609
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/247:00 am
GEG
-
MAN
2 stops32h 20m
Lufthansa
Wed 3/116:25 am
MAN
-
GEG
2 stops21h 53m
Lufthansa
Deal found 1/26$611
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/2412:25 pm
GEG
-
EDI
2 stops20h 25m
American Airlines
Thu 3/1211:25 am
EDI
-
GEG
2 stops19h 58m
American Airlines
Deal found 1/27$612
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/41:44 pm
GEG
-
LHR
2 stops18h 06m
Lufthansa
Wed 3/117:40 am
LHR
-
GEG
2 stops20h 38m
Lufthansa
Deal found 1/26$619
This Mytrip deal was found by Cheapflights users on 1/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/277:00 am
GEG
-
LHR
2 stops20h 50m
Multiple Airlines
Thu 3/127:40 am
LHR
-
GEG
2 stops20h 38m
Multiple Airlines
Deal found 1/25$621
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/46:00 am
GEG
-
LGW
2 stops19h 00m
American Airlines
Mon 3/911:20 am
LGW
-
GEG
2 stops31h 24m
American Airlines
Deal found 1/26$622
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 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 2/2412:48 pm
GEG
-
MAN
1 stop13h 42m
Delta
Wed 3/111:30 pm
MAN
-
GEG
2 stops26h 30m
Delta
Deal found 1/27$629
This Cheapflightsfares deal was found by Cheapflights users on 1/25. 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.
Mon 2/231:44 pm
GEG
-
LHR
2 stops18h 06m
Lufthansa
Mon 3/29:30 am
LHR
-
GEG
2 stops19h 47m
Lufthansa
Deal found 1/25$629
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/412:38 pm
GEG
-
LHR
1 stop15h 22m
United Airlines
Wed 3/116:35 am
LHR
-
GEG
2 stops21h 28m
United Airlines
Deal found 1/26$630
This Iberia 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/237:00 am
BOI
-
LHR
1 stop20h 00m
Iberia
Mon 3/27:40 pm
LHR
-
BOI
2 stops24h 02m
Iberia
Deal found 1/26$631
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.
Wed 3/46:05 am
GEG
-
LHR
1 stop20h 25m
Delta
Mon 3/96:30 am
LHR
-
GEG
2 stops21h 35m
Delta
Deal found 1/27$631

Find flight deals from Idaho to United Kingdom

Keep the following information in mind while searching for Idaho to United Kingdom flight deals. Data was last updated January 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$609
(Cheapflightsfares)

One-way from

$329
(Kiwi.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 Idaho to United Kingdom
Search Deals
One-way flight from Idaho 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 Idaho 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 28, 2026.
Use the filters below to find and compare flights from Idaho to the United Kingdom that are best for you.

Fly from

Idaho

Fly to

United Kingdom

Route

Depart

Return

Price

SpokaneManchester

GEG - MAN

GEGMAN

Spokane

Tue 2/24

7:00 am-11:20 pm

2 stops32h 20m

Manchester

Wed 3/11

6:25 am-9:18 pm

2 stops21h 53m

$611

SpokaneEdinburgh

GEG - EDI

GEGEDI

Spokane

Tue 2/24

12:25 pm-4:50 pm

2 stops20h 25m

Edinburgh Turnhouse

Thu 3/12

11:25 am-12:23 am

2 stops19h 58m

$612

SpokaneLondon

GEG - LGW

GEGLGW

Spokane

Wed 3/4

6:00 am-9:00 am

2 stops19h 00m

London Gatwick

Mon 3/9

11:20 am-11:44 am

2 stops31h 24m

$622

SpokaneManchester

GEG - MAN

GEGMAN

Spokane

Tue 2/24

12:48 pm-10:30 am

1 stop13h 42m

Manchester

Wed 3/11

1:30 pm-11:37 am

1 stop29h 07m

$629

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Mon 2/23

1:44 pm-3:50 pm

2 stops18h 06m

London Heathrow

Mon 3/2

9:30 am-9:17 pm

2 stops19h 47m

$629

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 2/24

7:00 am-7:55 am

1 stop16h 55m

London Heathrow

Tue 3/10

6:35 am-9:03 pm

2 stops21h 28m

$630

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Thu 3/5

6:00 am-7:55 am

1 stop17h 55m

London Heathrow

Sat 3/14

6:35 am-9:03 pm

2 stops21h 28m

$630

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 3/4

12:38 pm-12:00 pm

1 stop15h 22m

London Heathrow

Wed 3/11

6:35 am-9:03 pm

2 stops21h 28m

$630

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Mon 2/23

7:00 am-7:25 am

1 stop16h 25m

London Heathrow

Mon 3/2

7:40 am-9:07 pm

2 stops21h 27m

$630

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 3/4

7:00 am-5:55 am

1 stop14h 55m

London Heathrow

Mon 3/9

7:40 am-9:18 pm

2 stops20h 38m

$630

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Idaho to United Kingdom

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

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

Currently, August is the cheapest month in which you can book a flight from Idaho to United Kingdom (average of $618). Flying from Idaho 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.

Related info for your journey

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

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

    A quick flight from Idaho to United Kingdom can take about 13h 42m. Lufthansa provides one of the quickest options available for as low as $629. There are 4495 mi between Idaho and United Kingdom. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Idaho to United Kingdom (average of $618). Flying from Idaho 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 Idaho to United Kingdom

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Heathrow flights
John F Kennedy Intl to Charles de Gaulle flights
Newark to Heathrow flights
Newark to Charles de Gaulle flights
John F Kennedy Intl to Leonardo da Vinci/Fiumicino flights
Newark to Leonardo da Vinci/Fiumicino flights
Newark to Orly flights
Boston to Heathrow flights
Newark to Athens flights
John F Kennedy Intl to Lisbon flights
John F Kennedy Intl to Orly flights
Dulles Intl to Heathrow flights
John F Kennedy Intl to Madrid flights
LaGuardia to Heathrow flights
John F Kennedy Intl to London City flights
Newark to Dublin flights
Los Angeles to Heathrow flights
Newark to Barcelona-El Prat flights
LaGuardia to Charles de Gaulle flights
Miami to Madrid flights
John F Kennedy Intl to Dublin flights
O'Hare Intl to Leonardo da Vinci/Fiumicino flights
O'Hare Intl to Heathrow flights
Newark to Gatwick flights
John F Kennedy Intl to Athens flights
John F Kennedy Intl to Malpensa flights
San Francisco to Heathrow flights
Newark to Madrid flights
Dallas/Fort Worth to Heathrow flights
John F Kennedy Intl to Istanbul flights
John F Kennedy Intl to Gatwick flights
John F Kennedy Intl to Barcelona-El Prat flights
Boston to Charles de Gaulle flights
Newark to Malpensa flights
Baltimore to Heathrow flights
John F Kennedy Intl to Stansted flights
Dulles Intl to Charles de Gaulle flights
O'Hare Intl to Charles de Gaulle flights
Los Angeles to Charles de Gaulle flights
Boston to Leonardo da Vinci/Fiumicino flights
Newark to Lisbon flights
Dulles Intl to Leonardo da Vinci/Fiumicino flights
John F Kennedy Intl to Amsterdam flights
San Francisco to Charles de Gaulle flights
LaGuardia to Gatwick flights
LaGuardia to Leonardo da Vinci/Fiumicino flights
Dallas/Fort Worth to Leonardo da Vinci/Fiumicino flights
Seattle to Heathrow flights
Boston to Gatwick flights
San Francisco to Leonardo da Vinci/Fiumicino flights

Top 6 airlines flying from Idaho to United Kingdom

Discover the top 6 airlines that operate flights from Idaho 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 28, 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$997FlexibilityNo 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.
Site
Cookie settings©2026 Cheapflights