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Cheap flights from London Heathrow Airport to Idaho from £437

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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
21 Feb — 28 Feb1
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 22 January 2026.

Tue 17/209:00
LHR
-
GEG
2 stops20h 07m
United Airlines
Tue 24/207:00
GEG
-
LHR
1 stop20h 15m
United Airlines
Deal found 20/1£521
Tue 17/207:40
LHR
-
GEG
2 stops21h 27m
Lufthansa
Tue 24/212:38
GEG
-
LHR
2 stops24h 22m
Lufthansa
Deal found 20/1£522
Thu 5/206:35
LHR
-
GEG
2 stops20h 41m
United Airlines
Sun 8/206:53
GEG
-
LHR
1 stop21h 07m
United Airlines
Deal found 19/1£525
Mon 4/508:40
LHR
-
GEG
2 stops34h 36m
United Airlines
Sun 10/505:00
GEG
-
LHR
2 stops17h 55m
United Airlines
Deal found 20/1£533
Tue 10/314:45
LHR
-
GEG
1 stop37h 27m
Finnair
Tue 17/306:00
GEG
-
LHR
1 stop17h 50m
Finnair
Deal found 20/1£537
Tue 10/306:35
LHR
-
GEG
2 stops21h 28m
United Airlines
Tue 17/306:00
GEG
-
LHR
2 stops19h 25m
United Airlines
Deal found 20/1£541
Sat 7/213:45
LHR
-
SUN
1 stop14h 46m
United Airlines
Sat 14/214:32
SUN
-
LHR
1 stop12h 08m
United Airlines
Deal found 20/1£558
Wed 25/207:30
LHR
-
BOI
2 stops36h 03m
United Airlines
Sun 1/317:24
BOI
-
LHR
1 stop33h 16m
United Airlines
Deal found 21/1£568
Mon 20/409:00
LHR
-
BOI
2 stops20h 35m
United Airlines
Mon 27/406:15
BOI
-
LHR
2 stops18h 00m
United Airlines
Deal found 20/1£570
Wed 15/406:50
LHR
-
BOI
2 stops23h 07m
United Airlines
Wed 29/406:15
BOI
-
LHR
2 stops17h 30m
United Airlines
Deal found 20/1£571
Wed 15/411:25
LHR
-
BOI
1 stop13h 40m
Lufthansa
Wed 29/414:37
BOI
-
LHR
1 stop12h 03m
Lufthansa
Deal found 20/1£578
Fri 20/206:30
LHR
-
BOI
2 stops21h 25m
United Airlines
Mon 2/317:24
BOI
-
LHR
1 stop33h 16m
United Airlines
Deal found 20/1£579

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 22 January 2026.

Round-trip from

£521

One-way from

£437

Popular in

December

Cheapest in

January

Average price

£578
United Airlines
  • United Airlines
  • 17/2-24/2
  • 3 total stops
  • 40h 22m total
  • London to Idaho
Search Deals
12/3
  • 12/3
  • 3 total stops
  • 42h 03m 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. 6% potential price decrease (£31 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 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 22 January 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

Fri 6/3

12:05-21:03

2 stops40h 58m

Spokane

Fri 13/3

07:02-07:25

1 stop17h 23m

£521

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 17/2

09:00-21:07

2 stops20h 07m

Spokane

Tue 24/2

07:00-11:15

1 stop20h 15m

£521

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 17/2

07:40-21:07

2 stops21h 27m

Spokane

Tue 24/2

12:38-21:00

2 stops24h 22m

£522

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 5/2

06:35-19:16

2 stops20h 41m

Spokane

Sun 8/2

06:53-12:00

1 stop21h 07m

£525

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/3

06:35-21:18

2 stops21h 43m

Spokane

Tue 17/3

05:00-09:40

1 stop21h 40m

£525

LondonHailey

LHR - SUN

LHRSUN

London Heathrow

Sat 7/2

13:45-21:31

1 stop14h 46m

Hailey Sun Valley-Friedman

Sat 14/2

14:32-09:40

1 stop12h 08m

£558

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 20/4

09:00-22:35

2 stops20h 35m

Boise Air Term. Gowen Fld

Mon 27/4

06:15-07:15

2 stops18h 00m

£570

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 15/4

06:50-22:57

2 stops23h 07m

Boise Air Term. Gowen Fld

Wed 29/4

06:15-06:45

2 stops17h 30m

£571

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 27/2

06:30-20:55

2 stops21h 25m

Boise Air Term. Gowen Fld

Mon 9/3

06:15-09:40

1 stop21h 25m

£579

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 25/2

07:30-17:45

2 stops17h 15m

Boise Air Term. Gowen Fld

Sun 1/3

06:25-07:30

2 stops18h 05m

£581

Flights are sorted by cheapest return flights first.

Deals found on 20/1

Showing 1-10 of 40 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 £508). Flying from London Heathrow Airport to Idaho in February is currently the most expensive (average of £711). 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 22 January 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

Crew

8.2

Food

6.9

Overall

7.5

Boarding

7.7

Comfort

7.3

Entertainment

7.6

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

Crew

8.2

Food

6.9

Overall

7.5

Boarding

7.7

Comfort

7.3

Entertainment

7.6

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
9,191 reviews
Virgin Atlantic
7.5
Good
678 reviews
Check prices

Crew

8.2

Food

6.9

Overall

7.5

Boarding

7.7

Comfort

7.3

Entertainment

7.6

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
7,738 reviews
Virgin Atlantic
7.5
Good
678 reviews
Check prices

Crew

8.2

Food

6.9

Overall

7.5

Boarding

7.7

Comfort

7.3

Entertainment

7.6

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 £522, United Airlines can have you in Idaho from London Heathrow Airport in 21h 27m. 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 £508). Flying from London Heathrow Airport to Idaho in February is currently the most expensive (average of £711). 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 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 22 January 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£508Average£664FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£538Average£849FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£599Average£896FlexibilityNo 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!

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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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