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Cheap flights from London Heathrow Airport to Idaho from £366

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 14/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
17 Mar — 24 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Idaho

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Idaho
Explore the most affordable flight options available from Heathrow to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 February 2026.

Wed 11/306:35
LHR
-
GEG
2 stops21h 43m
Lufthansa
Wed 18/307:02
GEG
-
LHR
1 stop17h 23m
Lufthansa
Deal found 11/2£551
Wed 9/908:40
LHR
-
GEG
2 stops22h 58m
United Airlines
Wed 16/912:30
GEG
-
LHR
1 stop34h 55m
United Airlines
Deal found 13/2£565
Wed 2/908:40
LHR
-
BOI
2 stops19h 35m
United Airlines
Wed 30/917:22
BOI
-
LHR
1 stop33h 18m
United Airlines
Deal found 12/2£566
Wed 2/909:30
LHR
-
BOI
2 stops19h 52m
United Airlines
Mon 28/905:00
BOI
-
LHR
1 stop21h 40m
United Airlines
Deal found 12/2£570
Mon 4/508:40
LHR
-
GEG
2 stops21h 00m
United Airlines
Sun 10/512:25
GEG
-
LHR
1 stop35h 00m
United Airlines
Deal found 13/2£572
Wed 11/310:05
LHR
-
GEG
1 stop17h 58m
Multiple Airlines
Wed 18/307:02
GEG
-
LHR
1 stop17h 23m
Multiple Airlines
Deal found 11/2£575
Mon 20/416:00
LHR
-
BOI
2 stops24h 54m
Lufthansa
Mon 27/419:03
BOI
-
LHR
2 stops28h 42m
Lufthansa
Deal found 13/2£585
Thu 12/311:10
LHR
-
GEG
2 stops32h 31m
United Airlines
Thu 19/307:02
GEG
-
LHR
1 stop17h 23m
United Airlines
Deal found 12/2£587
Thu 23/407:25
LHR
-
GEG
2 stops22h 10m
Lufthansa
Mon 27/412:35
GEG
-
LHR
1 stop17h 35m
Lufthansa
Deal found 13/2£588
Thu 12/309:30
LHR
-
BOI
2 stops17h 43m
United Airlines
Thu 19/310:49
BOI
-
LHR
1 stop14h 36m
United Airlines
Deal found 11/2£589
Thu 17/906:30
LHR
-
BOI
2 stops18h 25m
Lufthansa
Tue 29/914:43
BOI
-
LHR
1 stop14h 37m
Lufthansa
Deal found 12/2£589
Tue 1/913:05
LHR
-
BOI
2 stops17h 54m
United Airlines
Wed 30/910:39
BOI
-
LHR
1 stop16h 01m
United Airlines
Deal found 12/2£593

Find flight deals from Heathrow to Idaho

Keep the following information in mind while searching for Heathrow to Idaho flight deals. Data was last updated 15 February 2026.

Round-trip from

£551

One-way from

£366

Popular in

December

Cheapest in

January

Average price

£609
Lufthansa
  • Lufthansa
  • 11/3-18/3
  • 3 total stops
  • 39h 06m total
  • London to Idaho
Search Deals
United Airlines
  • United Airlines
  • 14/5
  • 1 total stop
  • 15h 31m total
  • London to Idaho
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£49 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 February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow 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 15 February 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Idaho that are best for you.

Fly from

Heathrow

Fly to

Idaho

Route

Depart

Return

Price

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 4/5

08:40-21:40

2 stops21h 00m

Spokane

Sun 10/5

12:25-07:25

1 stop35h 00m

£572

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 11/3

10:05-21:03

1 stop17h 58m

Spokane

Wed 18/3

07:02-07:25

1 stop17h 23m

£575

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 20/4

16:00-09:54

2 stops24h 54m

Boise Air Term. Gowen Fld

Mon 27/4

19:03-06:45

2 stops28h 42m

£585

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 23/4

07:25-21:35

2 stops22h 10m

Spokane

Mon 27/4

07:00-11:10

1 stop20h 10m

£587

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 12/3

11:10-12:41

2 stops32h 31m

Spokane

Thu 19/3

07:02-07:25

1 stop17h 23m

£587

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Thu 12/3

06:30-21:29

2 stops20h 59m

Boise Air Term. Gowen Fld

Thu 19/3

06:15-06:40

2 stops18h 25m

£589

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 5/5

10:35-21:17

1 stop17h 42m

Boise Air Term. Gowen Fld

Wed 20/5

08:22-07:25

1 stop16h 03m

£593

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 4/5

11:05-21:17

2 stops17h 12m

Boise Air Term. Gowen Fld

Mon 18/5

14:33-09:40

1 stop12h 07m

£593

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 6/5

11:25-22:37

1 stop18h 12m

Boise Air Term. Gowen Fld

Wed 20/5

16:20-14:10

1 stop14h 50m

£593

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 5/5

08:00-18:17

2 stops17h 17m

Boise Air Term. Gowen Fld

Mon 18/5

06:30-09:40

1 stop20h 10m

£593

Flights are sorted by cheapest return flights first.

Deals found on 11/2

Showing 1-10 of 54 results
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Best time to book a flight from Heathrow to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from Heathrow 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 Heathrow Airport to Idaho

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

Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho (average of £500). Flying from London Heathrow Airport to Idaho in February is currently the most expensive (average of £699). 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 Heathrow Airport 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 15 February 2026.
See what other customers who have flown with Virgin Atlantic, United Airlines, andLufthansa from London Heathrow Airport to Idaho have to say. 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.
Virgin Atlantic
7.5
Good
678 reviews
Check prices

Food

6.9

Overall

7.5

Entertainment

7.6

Boarding

7.7

Comfort

7.3

Crew

8.2

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Virgin Atlantic
7.5
Good
678 reviews
Virgin Atlantic
7.5
Good
678 reviews
Check prices

Food

6.9

Overall

7.5

Entertainment

7.6

Boarding

7.7

Comfort

7.3

Crew

8.2

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
United Airlines
7.4
Good
9,293 reviews
Virgin Atlantic
7.5
Good
678 reviews
Check prices

Food

6.9

Overall

7.5

Entertainment

7.6

Boarding

7.7

Comfort

7.3

Crew

8.2

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Lufthansa
6.8
Okay
7,786 reviews
Virgin Atlantic
7.5
Good
678 reviews
Check prices

Food

6.9

Overall

7.5

Entertainment

7.6

Boarding

7.7

Comfort

7.3

Crew

8.2

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Related info for your journey

Find useful and relevant information for your journey from Heathrow 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 Heathrow Airport to Idaho?

    For as low as £572, United Airlines can have you in Idaho from London Heathrow Airport in 21h. Airlines will cover a distance of 4643 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most popular routes from London Heathrow Airport 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 Heathrow Airport to Idaho.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Heathrow 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 Heathrow Airport to Idaho?

    Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho (average of £500). Flying from London Heathrow Airport to Idaho in February is currently the most expensive (average of £699). 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

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Alternative routes for Heathrow 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 Heathrow to Idaho

Discover the top 3 airlines that operate flights from Heathrow 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 15 February 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£526Average£655FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£529Average£836FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£589Average£857FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

Fly with Cheapflights

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Idaho from Heathrow today with Cheapflights!

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Heathrow to Idaho.

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

Certainly. Search results for flights to Idaho from Heathrow shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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