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Cheap flights from London Heathrow Airport to Idaho from £440

LHR — BOI
24 Oct — 31 Oct1
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

Fri 23/1011:40 -
1 stop19h 19m
Thu 26/1114:00 -
1 stop13h 40m
Deal found 23/9£624
Thu 22/1017:00 -
1 stop13h 59m
Thu 29/1006:43 -
1 stop23h 37m
Deal found 22/9£627
Tue 3/1106:30 -
2 stops22h 03m
Fri 13/1110:13 -
2 stops20h 17m
Deal found 20/9£637
Tue 20/1017:00 -
1 stop13h 59m
Sat 31/1006:43 -
1 stop23h 37m
Deal found 20/9£640
Sat 31/1008:55 -
2 stops17h 11m
Tue 3/1113:53 -
1 stop13h 47m
Deal found 23/9£646
Tue 20/1011:40 -
1 stop18h 19m
Tue 27/1006:09 -
1 stop22h 31m
Deal found 21/9£678
Wed 28/1014:30 -
2 stops26h 49m
Mon 9/1112:00 -
2 stops16h 50m
Deal found 21/9£683
Wed 28/1014:30 -
2 stops26h 49m
Mon 9/1114:51 -
1 stop11h 49m
Deal found 21/9£686
Mon 16/1118:00 -
2 stops35h 51m
Tue 1/1214:48 -
2 stops32h 42m
Deal found 22/9£687
Thu 22/1017:45 -
1 stop24h 21m
Tue 17/1111:33 -
1 stop16h 07m
Deal found 24/9£736
Wed 21/1011:45 -
2 stops18h 14m
Wed 28/1013:58 -
1 stop14h 42m
Deal found 23/9£751
Wed 4/1114:45 -
1 stop15h 09m
Wed 11/1113:53 -
1 stop15h 27m
Deal found 20/9£788

Find flight deals from Heathrow to Idaho

Round-trip from

£624

One-way from

£440

Popular in

December

Cheapest in

January

Average price

£771
23/10-26/11
  • 23/10-26/11
  • 2 total stops
  • 32h 59m total
  • London to Idaho
Search Deals
16/12-31/12
  • 16/12-31/12
  • 3 total stops
  • 36h 51m total
  • London to Idaho
Search Deals
High demand for flights, 2% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£23 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2026
Search Deals

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from London Heathrow Airport to Idaho that are best for you.

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Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 16/12

12:10-18:01

3 stops36h 51m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£440

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Sun 8/11

16:40-21:15

2 stops59h 35m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£500

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Thu 17/12

09:50-18:01

3 stops39h 11m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£505

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 16/12

13:35-22:59

1 stop16h 24m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£582

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Fri 18/12

09:55-22:20

3 stops43h 25m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£615

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Sat 31/10

12:20-20:06

1 stop13h 46m

Boise Air Term. Gowen Fld

Tue 3/11

13:53-10:40

1 stop13h 47m

£667

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Tue 20/10

11:40-22:59

1 stop18h 19m

Idaho Falls Fanning Field

Tue 27/10

06:09-10:40

1 stop22h 31m

£678

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 21/10

07:30-23:59

2 stops23h 29m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£708

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Mon 19/10

17:00-23:59

1 stop13h 59m

Boise Air Term. Gowen Fld

Tue 27/10

09:12-12:20

2 stops21h 08m

£750

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Wed 21/10

11:40-22:59

1 stop18h 19m

Idaho Falls Fanning Field

Wed 28/10

13:58-10:40

1 stop14h 42m

£767

Flights are sorted by cheapest return flights first.

Deals found on 23/9

Showing 1-10 of 34 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

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Idaho

How much does it cost for a return flight from London Heathrow Airport to Idaho?

Airfare is below average for this route at the moment.
London Heathrow Airport to Idaho flights typically cost between £710 and £842 in October.
The cheapest return price found within the last 5 days was £624 on Multiple Airlines (23 Oct–26 Nov).

Reviews of airlines servicing Idaho

See what other customers who have flown with Alaska Airlines,United Airlines, andVirgin Atlantic 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.
Alaska Airlines
7.9
Good
12,965 reviews
Check prices

Boarding

8.1

Comfort

7.8

Crew

8.5

Food

7.0

Overall

7.9

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Chris,Aug 2026

GEG - SFO

Our flight was delayed multiple times over the course of the day for a total of almost ten hours. It was supposed to be a two-hour flight from San Francisco to Spokane. It turned into a nightmare of waiting all day in the airport, not knowing whether we would fly or not, whether we would miss my son's wedding and lose the expenses already incurred for car rental and accommodations. The Alaska staff seemed clueless and never gave us any convincing or definitive information. The airline offered food vouchers and discounts on future flights to make up for the trouble. However, the information about these concessions was not timely, nor were the vouchers themselves very useful. We were a family group of four people. The airline decided to give us one food voucher for $96, which is barely enough for four to get a sandwich and a drink each. Only by persistently addressing the airport food retailers were we able to get anything at all. Then, taking the exact opposite approach, the airline sent me, the original purchaser of all four tickets and the only email account they had, four vouchers for $150 each in the names of each of the four passengers. So, any one of us could get a discount on a future flight with Alaska in that amount. But I originally paid for all the tickets. It makes no sense, except to suggest that Alaska chooses the way to distribute vouchers that seems most likely to minimize the probability that they will be utilized. In my opinion, I should be offered a total refund for the ordeal we were forced to endure or at least a discount voucher for the entire $600.
Alaska Airlines
7.9
Good
12,965 reviews
Alaska Airlines
7.9
Good
12,965 reviews
Check prices

Boarding

8.1

Comfort

7.8

Crew

8.5

Food

7.0

Overall

7.9

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Chris,Aug 2026

GEG - SFO

Our flight was delayed multiple times over the course of the day for a total of almost ten hours. It was supposed to be a two-hour flight from San Francisco to Spokane. It turned into a nightmare of waiting all day in the airport, not knowing whether we would fly or not, whether we would miss my son's wedding and lose the expenses already incurred for car rental and accommodations. The Alaska staff seemed clueless and never gave us any convincing or definitive information. The airline offered food vouchers and discounts on future flights to make up for the trouble. However, the information about these concessions was not timely, nor were the vouchers themselves very useful. We were a family group of four people. The airline decided to give us one food voucher for $96, which is barely enough for four to get a sandwich and a drink each. Only by persistently addressing the airport food retailers were we able to get anything at all. Then, taking the exact opposite approach, the airline sent me, the original purchaser of all four tickets and the only email account they had, four vouchers for $150 each in the names of each of the four passengers. So, any one of us could get a discount on a future flight with Alaska in that amount. But I originally paid for all the tickets. It makes no sense, except to suggest that Alaska chooses the way to distribute vouchers that seems most likely to minimize the probability that they will be utilized. In my opinion, I should be offered a total refund for the ordeal we were forced to endure or at least a discount voucher for the entire $600.
United Airlines
7.4
Good
10,237 reviews
Alaska Airlines
7.9
Good
12,965 reviews
Check prices

Boarding

8.1

Comfort

7.8

Crew

8.5

Food

7.0

Overall

7.9

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Chris,Aug 2026

GEG - SFO

Our flight was delayed multiple times over the course of the day for a total of almost ten hours. It was supposed to be a two-hour flight from San Francisco to Spokane. It turned into a nightmare of waiting all day in the airport, not knowing whether we would fly or not, whether we would miss my son's wedding and lose the expenses already incurred for car rental and accommodations. The Alaska staff seemed clueless and never gave us any convincing or definitive information. The airline offered food vouchers and discounts on future flights to make up for the trouble. However, the information about these concessions was not timely, nor were the vouchers themselves very useful. We were a family group of four people. The airline decided to give us one food voucher for $96, which is barely enough for four to get a sandwich and a drink each. Only by persistently addressing the airport food retailers were we able to get anything at all. Then, taking the exact opposite approach, the airline sent me, the original purchaser of all four tickets and the only email account they had, four vouchers for $150 each in the names of each of the four passengers. So, any one of us could get a discount on a future flight with Alaska in that amount. But I originally paid for all the tickets. It makes no sense, except to suggest that Alaska chooses the way to distribute vouchers that seems most likely to minimize the probability that they will be utilized. In my opinion, I should be offered a total refund for the ordeal we were forced to endure or at least a discount voucher for the entire $600.
Virgin Atlantic
7.4
Good
694 reviews
Alaska Airlines
7.9
Good
12,965 reviews
Check prices

Boarding

8.1

Comfort

7.8

Crew

8.5

Food

7.0

Overall

7.9

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Chris,Aug 2026

GEG - SFO

Our flight was delayed multiple times over the course of the day for a total of almost ten hours. It was supposed to be a two-hour flight from San Francisco to Spokane. It turned into a nightmare of waiting all day in the airport, not knowing whether we would fly or not, whether we would miss my son's wedding and lose the expenses already incurred for car rental and accommodations. The Alaska staff seemed clueless and never gave us any convincing or definitive information. The airline offered food vouchers and discounts on future flights to make up for the trouble. However, the information about these concessions was not timely, nor were the vouchers themselves very useful. We were a family group of four people. The airline decided to give us one food voucher for $96, which is barely enough for four to get a sandwich and a drink each. Only by persistently addressing the airport food retailers were we able to get anything at all. Then, taking the exact opposite approach, the airline sent me, the original purchaser of all four tickets and the only email account they had, four vouchers for $150 each in the names of each of the four passengers. So, any one of us could get a discount on a future flight with Alaska in that amount. But I originally paid for all the tickets. It makes no sense, except to suggest that Alaska chooses the way to distribute vouchers that seems most likely to minimize the probability that they will be utilized. In my opinion, I should be offered a total refund for the ordeal we were forced to endure or at least a discount voucher for the entire $600.
Lufthansa
6.8
Okay
8,237 reviews
Alaska Airlines
7.9
Good
12,965 reviews
Check prices

Boarding

8.1

Comfort

7.8

Crew

8.5

Food

7.0

Overall

7.9

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Chris,Aug 2026

GEG - SFO

Our flight was delayed multiple times over the course of the day for a total of almost ten hours. It was supposed to be a two-hour flight from San Francisco to Spokane. It turned into a nightmare of waiting all day in the airport, not knowing whether we would fly or not, whether we would miss my son's wedding and lose the expenses already incurred for car rental and accommodations. The Alaska staff seemed clueless and never gave us any convincing or definitive information. The airline offered food vouchers and discounts on future flights to make up for the trouble. However, the information about these concessions was not timely, nor were the vouchers themselves very useful. We were a family group of four people. The airline decided to give us one food voucher for $96, which is barely enough for four to get a sandwich and a drink each. Only by persistently addressing the airport food retailers were we able to get anything at all. Then, taking the exact opposite approach, the airline sent me, the original purchaser of all four tickets and the only email account they had, four vouchers for $150 each in the names of each of the four passengers. So, any one of us could get a discount on a future flight with Alaska in that amount. But I originally paid for all the tickets. It makes no sense, except to suggest that Alaska chooses the way to distribute vouchers that seems most likely to minimize the probability that they will be utilized. In my opinion, I should be offered a total refund for the ordeal we were forced to endure or at least a discount voucher for the entire $600.

Related info for your journey

  • How long is the flight from London Heathrow Airport to Idaho?

    For as low as £750, Alaska Airlines can have you in Idaho from London Heathrow Airport in 13h 59m. 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 - 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.

See more FAQs

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Alternative routes for Heathrow to Idaho

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Stansted to Honolulu flights
Stansted to San Francisco flights
Heathrow to Austin flights
London City to Honolulu flights
London City to San Francisco flights
Heathrow to Sky Harbor Intl flights
Luton to Orlando flights
Gatwick to Boston flights
Gatwick to Dallas/Fort Worth flights

Top 4 airlines flying from Heathrow to Idaho

AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£515Average£778FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£532Average£940FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£729Average£882FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Alaska AirlinesCheapest£746Average£962FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

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