Find flights
When to book
Airlines
FAQs

Cheap flights from London to Idaho from £312

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 26/2. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BOI
13 Feb — 20 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Idaho

Keep the following information in mind while searching for London to Idaho flight deals. Data was last updated 14 January 2026.

Round-trip from

£485

One-way from

£312

Popular in

December

Cheapest in

January

Average price

£577
Iberia
  • Iberia
  • 4/5-10/5
  • 3 total stops
  • 66h 09m total
  • London to Idaho
Search Deals
26/2
  • 26/2
  • 3 total stops
  • 31h 44m total
  • London to Idaho
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£51 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£30 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Find 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 14 January 2026.

Mon 4/511:00
LHR
-
GEG
2 stops35h 19m
Iberia
Sun 10/513:33
GEG
-
LHR
2 stops36h 42m
Iberia
Deal found 13/1£485
Tue 10/308:20
LHR
-
GEG
2 stops21h 54m
Iberia
Tue 17/306:00
GEG
-
LHR
2 stops17h 15m
Iberia
Deal found 13/1£498
Sat 28/212:15
LHR
-
IDA
2 stops18h 21m
Multiple Airlines
Sat 7/308:00
IDA
-
LHR
2 stops19h 50m
Multiple Airlines
Deal found 14/1£502
Mon 9/206:05
LHR
-
GEG
2 stops20h 44m
Iberia
Mon 16/212:25
GEG
-
LHR
1 stop14h 00m
Iberia
Deal found 12/1£516
Thu 26/212:05
LHR
-
GEG
2 stops41h 02m
United Airlines
Thu 5/313:37
GEG
-
LHR
1 stop12h 03m
United Airlines
Deal found 12/1£519
Fri 27/209:00
LHR
-
GEG
2 stops20h 07m
United Airlines
Fri 6/318:37
GEG
-
LHR
1 stop31h 03m
United Airlines
Deal found 13/1£522
Thu 5/206:35
LHR
-
GEG
2 stops20h 41m
United Airlines
Sun 8/212:24
GEG
-
LHR
2 stops17h 06m
United Airlines
Deal found 11/1£523
Tue 10/206:50
LHR
-
GEG
2 stops36h 49m
United Airlines
Tue 17/207:00
GEG
-
LHR
1 stop14h 55m
United Airlines
Deal found 12/1£528
Fri 27/207:40
LHR
-
GEG
2 stops21h 27m
Lufthansa
Fri 6/312:41
GEG
-
LHR
2 stops20h 09m
Lufthansa
Deal found 13/1£530
Wed 15/407:25
LHR
-
GEG
2 stops19h 26m
Lufthansa
Mon 20/407:00
GEG
-
LHR
1 stop23h 10m
Lufthansa
Deal found 12/1£531
Wed 11/206:35
LHR
-
BOI
2 stops18h 32m
Lufthansa
Wed 18/208:05
BOI
-
LHR
1 stop14h 50m
Lufthansa
Deal found 14/1£537
Wed 15/406:55
LHR
-
BOI
2 stops21h 27m
Lufthansa
Wed 29/414:37
BOI
-
LHR
1 stop14h 43m
Lufthansa
Deal found 14/1£561

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 14 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

Mon 4/5

15:15-12:42

1 stop29h 27m

Spokane

Sun 10/5

13:33-10:15

2 stops36h 42m

£485

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/3

16:15-21:12

2 stops35h 57m

Spokane

Tue 17/3

12:25-10:25

1 stop15h 00m

£503

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 27/2

09:00-21:07

2 stops20h 07m

Spokane

Fri 6/3

18:37-09:40

1 stop31h 03m

£522

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 5/2

06:35-19:16

2 stops20h 41m

Spokane

Sun 8/2

12:24-13:30

2 stops17h 06m

£523

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 26/2

06:35-21:07

2 stops22h 32m

Spokane

Thu 5/3

12:42-13:30

2 stops16h 48m

£523

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/3

06:35-21:18

2 stops21h 43m

Spokane

Tue 17/3

13:37-09:40

1 stop13h 03m

£523

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 6/2

06:35-19:16

2 stops20h 41m

Spokane

Sat 21/2

12:38-13:30

2 stops16h 52m

£525

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 18/3

06:35-21:18

2 stops21h 43m

Spokane

Mon 23/3

13:37-15:50

2 stops19h 13m

£528

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 11/2

07:40-18:07

2 stops17h 27m

Boise Air Term. Gowen Fld

Wed 18/2

14:40-14:45

2 stops17h 05m

£563

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 20/4

07:25-09:54

2 stops33h 29m

Boise Air Term. Gowen Fld

Mon 27/4

12:30-14:10

1 stop18h 40m

£568

Flights are sorted by cheapest return flights first.

Deals found on 13/1

Showing 1-10 of 60 results
1
2
3
...
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, March is the cheapest month in which you can book a flight from London to Idaho (average of £507). Flying from London to Idaho in February is currently the most expensive (average of £710). 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 14 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
1,437 reviews
Check prices

Overall

7.7

Crew

8.4

Entertainment

7.1

Boarding

7.7

Comfort

7.6

Food

7.2

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
1,437 reviews
KLM
7.7
Good
1,437 reviews
Check prices

Overall

7.7

Crew

8.4

Entertainment

7.1

Boarding

7.7

Comfort

7.6

Food

7.2

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
1,437 reviews
Check prices

Overall

7.7

Crew

8.4

Entertainment

7.1

Boarding

7.7

Comfort

7.6

Food

7.2

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
9,156 reviews
KLM
7.7
Good
1,437 reviews
Check prices

Overall

7.7

Crew

8.4

Entertainment

7.1

Boarding

7.7

Comfort

7.6

Food

7.2

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
7,711 reviews
KLM
7.7
Good
1,437 reviews
Check prices

Overall

7.7

Crew

8.4

Entertainment

7.1

Boarding

7.7

Comfort

7.6

Food

7.2

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
7,671 reviews
KLM
7.7
Good
1,437 reviews
Check prices

Overall

7.7

Crew

8.4

Entertainment

7.1

Boarding

7.7

Comfort

7.6

Food

7.2

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 Iberia, United Airlines, and Lufthansa fly from London to Idaho in about 17h 27m. The time it takes to get you to your destination can typically vary by up to 12h. The distance from London to Idaho is about 4829 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 - Jackson Hole, 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 £507). Flying from London to Idaho in February is currently the most expensive (average of £710). 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 London to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to John F Kennedy Intl flights
Heathrow to Newark flights
Heathrow to LaGuardia flights
Gatwick to Newark flights
London City to John F Kennedy Intl flights
Gatwick to John F Kennedy Intl flights
Gatwick to LaGuardia flights
Stansted to John F Kennedy Intl flights
Heathrow to Miami flights
Heathrow to Los Angeles flights
Heathrow to Orlando flights
Luton to John F Kennedy Intl flights
Heathrow to Las Vegas flights
London City to Newark flights
Manchester to John F Kennedy Intl flights
Stansted to Newark flights
Luton to Newark flights
Heathrow to Boston flights
Gatwick to Orlando flights
Heathrow to Dallas/Fort Worth flights
Manchester to Orlando flights
Heathrow to San Francisco flights
Heathrow to Dulles Intl flights
Gatwick to Miami flights
Heathrow to Seattle flights
Gatwick to Los Angeles flights
Heathrow to O'Hare Intl flights
London City to Miami flights
Edinburgh to John F Kennedy Intl flights
London City to Los Angeles flights
Manchester to Newark flights
Manchester to LaGuardia flights
Gatwick to Boston flights
Edinburgh to Newark flights
Heathrow to Tampa flights
London City to Orlando flights
Stansted to Miami flights
Heathrow to Baltimore flights
Heathrow to Hobby flights
Gatwick to Las Vegas flights
Heathrow to Atlanta flights
Stansted to Los Angeles flights
London City to Las Vegas flights
Heathrow to Denver flights
Heathrow to Nashville flights
Heathrow to Fort Lauderdale flights
Heathrow to Ontario flights
Luton to Miami flights
Stansted to Orlando flights
Gatwick to San Francisco flights

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 14 January 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£534Average£657FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£537Average£834FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£598Average£863FlexibilityNo 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.

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.