Find flights
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Idaho from £429

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 6/7. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
3 Jun — 10 Jun1
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 4 May 2026.

Wed 9/908:40
LHR
-
GEG
2 stops33h 55m
United Airlines
Sun 13/916:00
GEG
-
LHR
1 stop33h 40m
United Airlines
Deal found 29/4£652
Wed 16/908:40
LHR
-
GEG
2 stops33h 55m
United Airlines
Sun 20/913:38
GEG
-
LHR
2 stops34h 07m
United Airlines
Deal found 3/5£656
Tue 1/906:55
LHR
-
GEG
2 stops22h 09m
United Airlines
Tue 8/906:00
GEG
-
LHR
1 stop17h 25m
United Airlines
Deal found 3/5£660
Wed 18/1106:35
LHR
-
BOI
2 stops18h 20m
United Airlines
Tue 1/1218:55
BOI
-
LHR
1 stop29h 30m
United Airlines
Deal found 2/5£660
Wed 18/1111:35
LHR
-
BOI
1 stop13h 20m
Lufthansa
Tue 1/1214:43
BOI
-
LHR
1 stop11h 57m
Lufthansa
Deal found 2/5£671
Tue 1/914:50
LHR
-
GEG
1 stop14h 14m
Lufthansa
Tue 8/913:38
GEG
-
LHR
1 stop14h 47m
Lufthansa
Deal found 3/5£673
Wed 30/911:25
LHR
-
BOI
1 stop13h 33m
United Airlines
Sun 4/1019:05
BOI
-
LHR
1 stop29h 20m
United Airlines
Deal found 29/4£680
Sat 5/906:40
LHR
-
BOI
2 stops20h 38m
Scandinavian Airlines
Tue 22/912:42
BOI
-
LHR
2 stops20h 18m
Scandinavian Airlines
Deal found 2/5£688
Sat 14/1106:35
LHR
-
BOI
2 stops18h 20m
United Airlines
Tue 1/1207:00
BOI
-
LHR
1 stop19h 40m
United Airlines
Deal found 2/5£691
Fri 13/1109:30
LHR
-
BOI
2 stops18h 46m
United Airlines
Tue 1/1210:39
BOI
-
LHR
2 stops18h 21m
United Airlines
Deal found 2/5£691
Sat 5/914:50
LHR
-
BOI
1 stop13h 35m
Lufthansa
Tue 22/914:44
BOI
-
LHR
1 stop11h 56m
Lufthansa
Deal found 2/5£700
Sat 5/906:55
LHR
-
BOI
2 stops17h 58m
Lufthansa
Sat 19/914:44
BOI
-
LHR
1 stop11h 56m
Lufthansa
Deal found 2/5£715

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 4 May 2026.

Round-trip from

£652

One-way from

£429

Popular in

December

Cheapest in

January

Average price

£697
United Airlines
  • United Airlines
  • 9/9-13/9
  • 3 total stops
  • 67h 35m total
  • London to Idaho
Search Deals
United Airlines
  • United Airlines
  • 6/7
  • 1 total stop
  • 17h 55m total
  • London to Idaho
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£42 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 May 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 4 May 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

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 16/9

08:40-10:35

2 stops33h 55m

Spokane

Sun 20/9

11:16-06:45

1 stop35h 29m

£656

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 1/9

06:55-21:04

2 stops22h 09m

Spokane

Tue 8/9

05:00-07:55

2 stops18h 55m

£660

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 9/9

10:35-21:16

1 stop18h 41m

Spokane

Sun 13/9

12:57-07:25

1 stop34h 28m

£681

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 30/9

11:25-17:58

1 stop13h 33m

Boise Air Term. Gowen Fld

Sun 4/10

14:45-07:25

1 stop33h 40m

£681

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sat 30/5

06:40-16:57

2 stops18h 17m

Spokane

Sat 6/6

11:05-16:25

3 stops21h 20m

£730

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 15/6

07:30-21:40

2 stops21h 10m

Boise Air Term. Gowen Fld

Mon 22/6

14:40-12:25

1 stop14h 45m

£777

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 23/6

11:25-09:45

1 stop29h 20m

Boise Air Term. Gowen Fld

Sat 4/7

05:00-06:30

2 stops18h 30m

£794

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 23/6

11:25-17:56

1 stop13h 31m

Boise Air Term. Gowen Fld

Sun 5/7

19:05-07:25

1 stop29h 20m

£798

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 5/6

08:40-10:27

2 stops33h 47m

Spokane

Sun 21/6

16:08-07:45

2 stops31h 37m

£801

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 1/7

10:25-21:05

2 stops18h 40m

Spokane

Tue 7/7

06:00-07:25

1 stop17h 25m

£803

Flights are sorted by cheapest return flights first.

Deals found on 2/5

Showing 1-10 of 55 resultsSorted by cheapest first
1
2
3
...
6

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 £502). Flying from London Heathrow Airport to Idaho in February is currently the most expensive (average of £673). 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 4 May 2026.
See what other customers who have flown with United Airlines,Virgin Atlantic, 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.
United Airlines
7.4
Good
9,680 reviews
Check prices

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,680 reviews
United Airlines
7.4
Good
9,680 reviews
Check prices

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
Virgin Atlantic
7.4
Good
688 reviews
United Airlines
7.4
Good
9,680 reviews
Check prices

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
Lufthansa
6.8
Okay
7,972 reviews
United Airlines
7.4
Good
9,680 reviews
Check prices

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

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 £794, United Airlines can have you in Idaho from London Heathrow Airport in 29h 20m. Airlines will cover a distance of 4829 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 - Idaho Falls Fanning Field, 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 £502). Flying from London Heathrow Airport to Idaho in February is currently the most expensive (average of £673). 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 Heathrow 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
Gatwick to John F Kennedy Intl flights
Heathrow to LaGuardia flights
Stansted to John F Kennedy Intl flights
London City to John F Kennedy Intl flights
Gatwick to Newark flights
Heathrow to Los Angeles flights
Gatwick to LaGuardia flights
Heathrow to Orlando flights
Luton to John F Kennedy Intl flights
London City to Newark flights
Stansted to Newark flights
Heathrow to Miami flights
Luton to Newark flights
Heathrow to Boston flights
Heathrow to San Francisco flights
Heathrow to O'Hare Intl flights
Heathrow to Dulles Intl flights
Heathrow to Dallas/Fort Worth flights
Heathrow to Las Vegas flights
Gatwick to Orlando flights
Heathrow to Seattle flights
Heathrow to Baltimore flights
Gatwick to Los Angeles flights
Stansted to Los Angeles flights
Gatwick to Boston flights
London City to Los Angeles flights
Heathrow to Hobby flights
Heathrow to Atlanta flights
Stansted to Orlando flights
Gatwick to Miami flights
Stansted to Miami flights
London City to Miami flights
Heathrow to George Bush Intcntl flights
London City to Orlando flights
Heathrow to Tampa flights
Luton to Los Angeles flights
Gatwick to San Francisco flights
Stansted to LaGuardia flights
London City to Boston flights
London City to San Francisco flights
Heathrow to Ontario flights
Stansted to Boston flights
Stansted to San Francisco flights
Heathrow to Reagan-National flights
Gatwick to Dulles Intl flights
Luton to Miami flights
Stansted to Dulles Intl flights
Heathrow to Nashville flights

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 4 May 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£502Average£664FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£540Average£852FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£593Average£823FlexibilityNo 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 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!

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.