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Cheap flights from London to Idaho from £376

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 29/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BOI
23 Feb — 2 Mar1
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 24 January 2026.

Thu 5/206:35
LHR
-
GEG
2 stops20h 41m
United Airlines
Sun 8/205:00
GEG
-
LHR
2 stops18h 55m
United Airlines
Deal found 21/1£520
Tue 10/311:10
LHR
-
GEG
2 stops32h 31m
United Airlines
Tue 24/313:37
GEG
-
LHR
1 stop13h 03m
United Airlines
Deal found 23/1£521
Sun 8/309:30
LHR
-
GEG
2 stops18h 33m
United Airlines
Sun 15/318:37
GEG
-
LHR
2 stops28h 18m
United Airlines
Deal found 22/1£522
Tue 10/309:30
LHR
-
GEG
2 stops18h 33m
Lufthansa
Tue 24/312:42
GEG
-
LHR
2 stops17h 48m
Lufthansa
Deal found 23/1£523
Tue 10/311:10
LHR
-
GEG
2 stops32h 31m
United Airlines
Tue 17/312:42
GEG
-
LHR
1 stop35h 43m
United Airlines
Deal found 24/1£525
Tue 10/309:30
LHR
-
GEG
2 stops18h 33m
Lufthansa
Tue 17/313:37
GEG
-
LHR
2 stops20h 28m
Lufthansa
Deal found 24/1£530
Sat 2/506:55
LHR
-
GEG
2 stops19h 41m
United Airlines
Sun 10/512:35
GEG
-
LHR
1 stop17h 35m
United Airlines
Deal found 22/1£532
Mon 4/507:25
LHR
-
GEG
2 stops37h 14m
United Airlines
Sun 10/512:35
GEG
-
LHR
2 stops37h 35m
United Airlines
Deal found 23/1£534
Tue 10/314:45
LHR
-
GEG
1 stop37h 27m
Finnair
Tue 17/312:25
GEG
-
LHR
1 stop13h 10m
Finnair
Deal found 22/1£534
Sun 8/311:35
LHR
-
GEG
1 stop16h 43m
Multiple Airlines
Sun 15/307:02
GEG
-
LHR
1 stop17h 23m
Multiple Airlines
Deal found 22/1£538
Tue 10/309:50
LCY
-
GEG
2 stops18h 13m
Lufthansa
Tue 24/313:37
GEG
-
LCY
2 stops20h 58m
Lufthansa
Deal found 23/1£546
Mon 21/906:30
LHR
-
BOI
2 stops23h 17m
Multiple Airlines
Sat 3/1008:47
BOI
-
LHR
2 stops20h 03m
Multiple Airlines
Deal found 22/1£548

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 24 January 2026.

Round-trip from

£520

One-way from

£376

Popular in

December

Cheapest in

January

Average price

£573
United Airlines
  • United Airlines
  • 5/2-8/2
  • 4 total stops
  • 39h 36m total
  • London to Idaho
Search Deals
29/5
  • 29/5
  • 3 total stops
  • 32h 58m total
  • London to Idaho
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£50 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 January 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 24 January 2026.
Use the filters below to find and compare flights from London to Idaho that are best for you.

Fly from

London

Fly to

Idaho

Route

Depart

Return

Price

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 5/2

06:35-19:16

2 stops20h 41m

Spokane

Sun 8/2

11:25-11:15

1 stop15h 50m

£520

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sun 8/3

07:40-20:03

2 stops20h 23m

Spokane

Sun 15/3

12:42-12:00

1 stop16h 18m

£520

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/3

06:35-21:03

2 stops21h 28m

Spokane

Tue 17/3

05:00-09:40

1 stop21h 40m

£520

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/3

11:10-12:41

2 stops32h 31m

Spokane

Tue 24/3

13:37-09:40

1 stop13h 03m

£521

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sun 8/3

09:30-20:03

2 stops18h 33m

Spokane

Sun 15/3

18:37-05:55

2 stops28h 18m

£522

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/3

09:30-21:03

2 stops18h 33m

Spokane

Tue 24/3

12:42-13:30

2 stops17h 48m

£523

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 4/5

06:55-12:39

2 stops37h 44m

Spokane

Sun 10/5

06:00-14:10

1 stop24h 10m

£532

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sat 2/5

06:55-18:36

2 stops19h 41m

Spokane

Sun 10/5

06:00-10:10

2 stops20h 10m

£532

LondonSpokane

LCY - GEG

LCYGEG

London City

Tue 10/3

09:50-21:03

2 stops18h 13m

Spokane

Tue 24/3

13:37-17:35

2 stops20h 58m

£546

LondonHailey

LHR - SUN

LHRSUN

London Heathrow

Sat 7/2

10:05-21:31

1 stop18h 26m

Hailey Sun Valley-Friedman

Sat 14/2

08:09-07:25

1 stop16h 16m

£553

Flights are sorted by cheapest return flights first.

Deals found on 22/1

Showing 1-10 of 60 results
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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, March is the cheapest month in which you can book a flight from London to Idaho (average of £503). Flying from London to Idaho in February is currently the most expensive (average of £705). 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 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 24 January 2026.
Get a feel of what it's like to fly with KLM, Virgin Atlantic, andUnited Airlines 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.
KLM
7.7
Good
1,443 reviews
Check prices

Overall

7.7

Crew

8.4

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,443 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Overall

7.7

Crew

8.4

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Virgin Atlantic
7.5
Good
678 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Overall

7.7

Crew

8.4

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
United Airlines
7.4
Good
9,193 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Overall

7.7

Crew

8.4

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Lufthansa
6.8
Okay
7,744 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Overall

7.7

Crew

8.4

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
British Airways
6.7
Okay
7,694 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Overall

7.7

Crew

8.4

Entertainment

7.1

Boarding

7.8

Comfort

7.6

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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, Lufthansa, and Virgin Atlantic fly from London to Idaho in about 14h 04m. The time it takes to get you to your destination can typically vary by up to 6h 37m. The distance from London to Idaho is about 4705 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 Gatwick - Boise Air Term. Gowen Fld, 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, March is the cheapest month in which you can book a flight from London to Idaho (average of £503). Flying from London to Idaho in February is currently the most expensive (average of £705). 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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Top 3 airlines flying from London to Idaho

Discover the top 3 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 24 January 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£503Average£659FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£533Average£841FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£594Average£888FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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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