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Cheap flights from London Heathrow Airport to Idaho from £411

LHR — BOI
27 Nov — 4 Dec1
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

Wed 4/1106:40 -
2 stops23h 24m
Sun 8/1116:00 -
2 stops22h 40m
Deal found 26/10£653
Mon 7/1214:30 -
2 stops27h 38m
Mon 25/106:20 -
2 stops17h 50m
Deal found 24/10£687
Mon 7/1215:20 -
2 stops26h 48m
Mon 25/114:35 -
1 stop12h 05m
Deal found 24/10£691
Mon 7/1214:30 -
2 stops27h 38m
Sun 28/212:37 -
1 stop34h 18m
Deal found 25/10£708
Mon 7/1214:45 -
1 stop34h 38m
Sun 28/216:00 -
1 stop13h 20m
Deal found 25/10£724
Fri 11/1214:45 -
1 stop30h 34m
Thu 24/1214:12 -
1 stop15h 08m
Deal found 28/10£725
Mon 23/1114:45 -
1 stop25h 59m
Sun 6/1219:45 -
1 stop33h 35m
Deal found 26/10£728
Mon 23/1106:30 -
2 stops18h 33m
Sun 6/1208:15 -
2 stops20h 05m
Deal found 26/10£737
Sat 21/1114:45 -
1 stop16h 14m
Sat 28/1121:59 -
1 stop31h 21m
Deal found 24/10£745
Mon 9/1114:45 -
1 stop14h 35m
Thu 12/1110:49 -
1 stop18h 31m
Deal found 25/10£749
Tue 17/1111:50 -
1 stop16h 53m
Mon 30/1113:43 -
2 stops37h 42m
Deal found 27/10£878
Tue 17/1108:20 -
1 stop20h 23m
Mon 30/1108:00 -
1 stop21h 10m
Deal found 27/10£897

Find flight deals from Heathrow to Idaho

Round-trip from

£653

One-way from

£411

Popular in

August

Cheapest in

April

Average price

£861
Scandinavian Airlines
  • Scandinavian Airlines
  • 9/11-14/11
  • 4 total stops
  • 42h 32m total
  • London to Idaho
Search Deals
7/12-31/12
  • 7/12-31/12
  • 3 total stops
  • 52h 14m total
  • London to Idaho
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£75 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 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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Cheapest return flight

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Sun 21/3

20:35-22:20

2 stops55h 45m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£563

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 6/1

14:45-23:46

1 stop16h 01m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£587

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Mon 14/12

13:45-11:08

1 stop28h 23m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£611

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Tue 6/4

10:35-19:16

1 stop15h 41m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£629

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 7/4

14:10-23:06

1 stop15h 56m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£629

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Mon 7/12

11:35-11:08

2 stops30h 33m

Boise Air Term. Gowen Fld

Sun 28/2

14:35-20:35

2 stops23h 00m

£691

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Tue 5/1

18:00-14:52

2 stops27h 52m

Boise Air Term. Gowen Fld

Tue 12/1

16:10-05:55

2 stops30h 45m

£704

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Mon 23/11

14:45-09:44

1 stop25h 59m

Boise Air Term. Gowen Fld

Sun 6/12

19:45-12:20

1 stop33h 35m

£728

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 28/1

14:45-15:21

1 stop31h 36m

Idaho Falls Fanning Field

Mon 1/2

13:56-12:20

1 stop15h 24m

£731

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Sat 21/11

14:45-23:59

1 stop16h 14m

Boise Air Term. Gowen Fld

Sat 28/11

21:59-12:20

1 stop31h 21m

£745

Flights are sorted by cheapest return flights first.

Deals found on 24/10

Showing 1-10 of 27 resultsSorted by cheapest first
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2
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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 £734 and £814 in November.
The cheapest return price found within the last 5 days was £653 on Scandinavian Airlines (9 Nov–14 Nov).

Reviews of airlines servicing Idaho

See what other customers who have flown with Alaska Airlines,Virgin Atlantic, andUnited Airlines 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
13,130 reviews
Check prices

Boarding

8.1

Entertainment

7.0

Food

7.0

Crew

8.5

Overall

7.9

Comfort

7.8

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
13,130 reviews
Alaska Airlines
7.9
Good
13,130 reviews
Check prices

Boarding

8.1

Entertainment

7.0

Food

7.0

Crew

8.5

Overall

7.9

Comfort

7.8

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
7.5
Good
698 reviews
Alaska Airlines
7.9
Good
13,130 reviews
Check prices

Boarding

8.1

Entertainment

7.0

Food

7.0

Crew

8.5

Overall

7.9

Comfort

7.8

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
7.3
Good
10,443 reviews
Alaska Airlines
7.9
Good
13,130 reviews
Check prices

Boarding

8.1

Entertainment

7.0

Food

7.0

Crew

8.5

Overall

7.9

Comfort

7.8

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
8,298 reviews
Alaska Airlines
7.9
Good
13,130 reviews
Check prices

Boarding

8.1

Entertainment

7.0

Food

7.0

Crew

8.5

Overall

7.9

Comfort

7.8

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 £897, United Airlines can have you in Idaho from London Heathrow Airport in 20h 23m. Airlines will cover a distance of 4705 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.

See more FAQs

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Alternative routes for Heathrow to Idaho

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Top 4 airlines flying from Heathrow to Idaho

AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£512Average£777FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£529Average£952FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Alaska AirlinesCheapest£724Average£880FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Virgin AtlanticCheapest£725Average£855FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

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