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Cheap flights from London Heathrow Airport to Idaho from £424

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 15/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
2 May — 9 May1
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 2 April 2026.

Tue 28/407:25
LHR
-
GEG
2 stops21h 46m
Lufthansa
Tue 5/512:25
GEG
-
LHR
2 stops22h 15m
Lufthansa
Deal found 30/3£646
Tue 6/1014:50
LHR
-
BOI
1 stop13h 26m
Lufthansa
Wed 21/1012:29
BOI
-
LHR
1 stop16h 26m
Lufthansa
Deal found 29/3£646
Wed 30/908:40
LHR
-
GEG
2 stops22h 58m
United Airlines
Sun 4/1016:00
GEG
-
LHR
2 stops30h 55m
United Airlines
Deal found 30/3£654
Tue 6/1007:25
LHR
-
BOI
2 stops17h 30m
United Airlines
Wed 21/1008:40
BOI
-
LHR
1 stop15h 05m
United Airlines
Deal found 30/3£659
Wed 22/413:05
LHR
-
GEG
2 stops16h 26m
Icelandair
Tue 28/414:45
GEG
-
LHR
2 stops21h 35m
Icelandair
Deal found 1/4£670
Wed 7/1014:50
LHR
-
BOI
1 stop13h 26m
United Airlines
Thu 22/1006:20
BOI
-
LHR
1 stop18h 05m
United Airlines
Deal found 30/3£683
Tue 6/1015:05
LHR
-
BOI
2 stops37h 10m
Air Canada
Sun 18/1006:20
BOI
-
LHR
2 stops44h 40m
Air Canada
Deal found 30/3£685
Wed 22/413:05
LHR
-
GEG
2 stops16h 26m
Icelandair
Wed 29/406:00
GEG
-
LHR
2 stops30h 20m
Icelandair
Deal found 2/4£688
Fri 25/909:30
LHR
-
BOI
2 stops19h 52m
United Airlines
Tue 29/907:00
BOI
-
LHR
2 stops15h 55m
United Airlines
Deal found 30/3£688
Mon 5/1017:40
LHR
-
BOI
2 stops28h 16m
Air Canada
Tue 20/1011:45
BOI
-
LHR
2 stops18h 35m
Air Canada
Deal found 30/3£689
Mon 5/1017:40
LHR
-
BOI
2 stops28h 16m
Air Canada
Sun 18/1006:20
BOI
-
LHR
2 stops44h 40m
Air Canada
Deal found 30/3£691
Thu 8/1014:50
LHR
-
GEG
1 stop14h 19m
Lufthansa
Thu 15/1007:02
GEG
-
LHR
1 stop20h 08m
Lufthansa
Deal found 29/3£694

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 2 April 2026.

Round-trip from

£646

One-way from

£424

Popular in

December

Cheapest in

January

Average price

£633
Lufthansa
  • Lufthansa
  • 28/4-5/5
  • 4 total stops
  • 44h 01m total
  • London to Idaho
Search Deals
15/4
  • 15/4
  • 3 total stops
  • 38h 07m total
  • London to Idaho
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£56 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£31 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 2 April 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Idaho that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 25/9

09:30-22:22

2 stops19h 52m

Boise Air Term. Gowen Fld

Tue 29/9

07:00-05:55

2 stops15h 55m

£688

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sun 6/9

07:30-21:19

2 stops20h 49m

Boise Air Term. Gowen Fld

Sun 20/9

19:01-11:10

1 stop33h 09m

£692

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sun 6/9

11:25-21:25

1 stop17h 00m

Boise Air Term. Gowen Fld

Sun 20/9

12:23-06:45

1 stop35h 22m

£697

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 14/4

13:05-16:19

2 stops34h 14m

Idaho Falls Fanning Field

Tue 21/4

06:00-20:20

2 stops31h 20m

£712

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 22/4

09:55-21:05

2 stops19h 10m

Spokane

Tue 28/4

11:25-12:10

1 stop16h 45m

£761

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 22/4

09:55-18:57

2 stops17h 02m

Spokane

Wed 29/4

11:25-15:35

1 stop20h 10m

£762

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 22/4

12:55-20:33

1 stop15h 38m

Spokane

Wed 29/4

15:15-15:05

1 stop15h 50m

£764

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

21:25-22:56

2 stops32h 31m

Idaho Falls Fanning Field

Fri 25/9

13:45-20:20

2 stops23h 35m

£800

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 21/5

12:10-10:27

2 stops54h 17m

Spokane

Thu 11/6

05:00-11:50

2 stops22h 50m

£808

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 28/4

06:30-18:17

2 stops18h 47m

Idaho Falls Fanning Field

Tue 5/5

18:58-20:10

2 stops18h 12m

£825

Flights are sorted by cheapest return flights first.

Deals found on 31/3

Showing 1-10 of 47 resultsSorted by cheapest first
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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 £515). Flying from London Heathrow Airport to Idaho in February is currently the most expensive (average of £688). 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 2 April 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
685 reviews
Check prices

Entertainment

7.5

Comfort

7.3

Boarding

7.7

Food

6.9

Overall

7.5

Crew

8.1

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
685 reviews
Virgin Atlantic
7.5
Good
685 reviews
Check prices

Entertainment

7.5

Comfort

7.3

Boarding

7.7

Food

6.9

Overall

7.5

Crew

8.1

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
9,538 reviews
Virgin Atlantic
7.5
Good
685 reviews
Check prices

Entertainment

7.5

Comfort

7.3

Boarding

7.7

Food

6.9

Overall

7.5

Crew

8.1

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
7,885 reviews
Virgin Atlantic
7.5
Good
685 reviews
Check prices

Entertainment

7.5

Comfort

7.3

Boarding

7.7

Food

6.9

Overall

7.5

Crew

8.1

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 £761, United Airlines can have you in Idaho from London Heathrow Airport in 19h 10m. 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 - Jackson Hole or London Heathrow - Spokane, 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 £515). Flying from London Heathrow Airport to Idaho in February is currently the most expensive (average of £688). 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 2 April 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£513Average£678FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£552Average£871FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£606Average£837FlexibilityNo 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.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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