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Cheap flights from London to Idaho from £298

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 27/10. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BOI
25 Jul — 1 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Idaho

Enter your travel dates to find the best prices.

Cheapest flights from London to Idaho
Explore the most affordable flight options available from London to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 June 2026.

Wed 16/911:25
LHR
-
GEG
1 stop17h 49m
United Airlines
Mon 21/911:11
GEG
-
LHR
1 stop13h 19m
United Airlines
Deal found 21/6£520
Mon 7/1215:20
LHR
-
GEG
2 stops28h 04m
United Airlines
Sun 17/112:30
GEG
-
LHR
1 stop34h 55m
United Airlines
Deal found 24/6£627
Wed 9/1213:00
LHR
-
GEG
2 stops42h 38m
Air Canada
Sun 17/107:02
GEG
-
LHR
2 stops44h 48m
Air Canada
Deal found 24/6£630
Fri 4/1215:20
LHR
-
GEG
2 stops28h 04m
United Airlines
Wed 13/105:00
GEG
-
LHR
2 stops16h 55m
United Airlines
Deal found 24/6£657
Mon 7/1215:20
LHR
-
GEG
2 stops28h 04m
United Airlines
Sat 16/107:02
GEG
-
LHR
1 stop16h 23m
United Airlines
Deal found 23/6£658
Fri 11/914:10
LHR
-
BOI
2 stops32h 21m
United Airlines
Sun 27/918:50
BOI
-
LHR
1 stop29h 35m
United Airlines
Deal found 23/6£658
Thu 12/1107:40
LHR
-
BOI
2 stops23h 06m
United Airlines
Mon 16/1111:51
BOI
-
LHR
1 stop16h 24m
United Airlines
Deal found 20/6£659
Sat 5/1213:00
LHR
-
GEG
2 stops31h 40m
Air Canada
Sun 17/107:02
GEG
-
LHR
2 stops42h 18m
Air Canada
Deal found 24/6£660
Thu 10/1211:10
LHR
-
GEG
2 stops20h 28m
Air Canada
Wed 13/107:02
GEG
-
LHR
2 stops20h 48m
Air Canada
Deal found 24/6£663
Sat 11/706:40
LHR
-
BOI
2 stops19h 43m
Scandinavian Airlines
Sat 3/1010:34
BOI
-
LHR
2 stops28h 06m
Scandinavian Airlines
Deal found 24/6£685
Tue 8/1210:25
LHR
-
GEG
2 stops18h 44m
United Airlines
Mon 18/111:30
GEG
-
LHR
1 stop12h 25m
United Airlines
Deal found 24/6£688
Sat 11/706:40
LHR
-
BOI
2 stops22h 38m
Scandinavian Airlines
Sat 10/1012:42
BOI
-
LHR
3 stops23h 08m
Scandinavian Airlines
Deal found 24/6£688

Find flight deals from London to Idaho

Keep the following information in mind while searching for London to Idaho flight deals. Data was last updated 25 June 2026.

Round-trip from

£520

One-way from

£298

Popular in

December

Cheapest in

January

Average price

£825
United Airlines
  • United Airlines
  • 16/9-21/9
  • 2 total stops
  • 31h 08m total
  • London to Idaho
Search Deals
Virgin Atlantic
  • Virgin Atlantic
  • 27/10
  • 2 total stops
  • 17h 32m total
  • London to Idaho
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£44 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£29 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Idaho 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 858,174 searches. Data last updated 25 June 2026.
Use the filters below to find and compare flights from London to Idaho that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 16/9

14:50-21:14

1 stop14h 24m

Spokane

Mon 21/9

11:11-11:55

1 stop16h 44m

£520

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 7/12

16:20-11:24

2 stops27h 04m

Spokane

Sat 16/1

07:02-07:25

1 stop16h 23m

£657

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 8/12

09:10-21:09

2 stops19h 59m

Spokane

Tue 19/1

07:02-07:25

1 stop16h 23m

£688

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Thu 12/11

06:35-21:19

2 stops21h 44m

Boise Air Term. Gowen Fld

Mon 16/11

08:22-11:15

1 stop19h 53m

£691

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 4/12

13:45-23:38

1 stop17h 53m

Spokane

Thu 14/1

12:30-11:15

1 stop14h 45m

£704

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 10/12

13:45-23:38

1 stop17h 53m

Spokane

Wed 13/1

12:30-11:15

1 stop14h 45m

£704

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sat 5/12

13:45-23:38

1 stop17h 53m

Spokane

Wed 13/1

12:30-11:15

1 stop14h 45m

£704

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 11/9

11:25-22:40

1 stop18h 15m

Boise Air Term. Gowen Fld

Sun 27/9

18:50-07:25

1 stop29h 35m

£719

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Thu 10/9

07:30-17:58

2 stops17h 28m

Boise Air Term. Gowen Fld

Sat 26/9

08:08-06:45

1 stop15h 37m

£726

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Thu 3/12

14:45-15:29

1 stop31h 44m

Idaho Falls Fanning Field

Mon 7/12

16:03-12:20

1 stop13h 17m

£794

Flights are sorted by cheapest return flights first.

Deals found on 25/6

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
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6

Best time to book a flight from London to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from London with our price prediction graph.
Estimated return 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 London to Idaho

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

Currently, January is the cheapest month in which you can book a flight from London to Idaho (average of £511). Flying from London to Idaho in July is currently the most expensive (average of £671). 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.

How much does it cost for a return flight from London to Idaho?

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. 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 Idaho. Reviews last updated 25 June 2026.
Get a feel of what it's like to fly with Virgin Atlantic,United Airlines, andIcelandair from London to Idaho by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
690 reviews
Check prices

Food

6.9

Comfort

7.3

Crew

8.1

Overall

7.5

Boarding

7.7

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Virgin Atlantic
7.5
Good
690 reviews
Virgin Atlantic
7.5
Good
690 reviews
Check prices

Food

6.9

Comfort

7.3

Crew

8.1

Overall

7.5

Boarding

7.7

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
United Airlines
7.4
Good
9,887 reviews
Virgin Atlantic
7.5
Good
690 reviews
Check prices

Food

6.9

Comfort

7.3

Crew

8.1

Overall

7.5

Boarding

7.7

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Icelandair
7.0
Good
689 reviews
Virgin Atlantic
7.5
Good
690 reviews
Check prices

Food

6.9

Comfort

7.3

Crew

8.1

Overall

7.5

Boarding

7.7

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Lufthansa
6.8
Okay
8,092 reviews
Virgin Atlantic
7.5
Good
690 reviews
Check prices

Food

6.9

Comfort

7.3

Crew

8.1

Overall

7.5

Boarding

7.7

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

Related info for your journey

Find useful and relevant information for your journey from London to Idaho. 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 London to Idaho?

    Airlines like United Airlines, Alaska Airlines, and American Airlines fly from London to Idaho in about 14h 24m. The time it takes to get you to your destination can typically vary by up to 17h 20m. The distance from London to Idaho is about 4643 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most popular routes from London to Idaho?

    While some choose either London Heathrow - Spokane or London Heathrow - Idaho Falls Fanning Field, London Heathrow - Boise Air Term. Gowen Fld is the most popular route from London to Idaho.

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

    Yes. In addition to deals on London to Idaho flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Idaho?

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

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

    Yes. Cheapflights offers flight deals from London to Idaho 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 London to Idaho?

    Currently, January is the cheapest month in which you can book a flight from London to Idaho (average of £511). Flying from London to Idaho in July is currently the most expensive (average of £671). 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

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Alternative routes for London to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
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Gatwick to Dulles Intl flights
London City to Orlando flights
Heathrow to Reagan-National flights
Stansted to San Francisco flights
Stansted to Boston flights
Heathrow to Philadelphia flights
London City to Dulles Intl flights

Top 4 airlines flying from London to Idaho

Discover the top 4 airlines that operate flights from London to Idaho. 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 858,174 searches. Data last updated 25 June 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£517Average£677FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£557Average£696FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£606Average£850FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Alaska AirlinesCheapest£749Average£967FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to Idaho?

Deals for London to Idaho flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from London to Idaho?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from London to Idaho for you. Better yet — we are completely free to use.

Can Cheapflights find flights from London to Idaho with no change fees?

Yes, we can. To see specific flights from London to Idaho with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from London to Idaho become cheaper?

Of course! You can now track prices for flights from London to Idaho and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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