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Cheap flights from London Heathrow Airport to Idaho from £435

LHR — BOI
20 Nov — 27 Nov1
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

Thu 24/1214:45 -
1 stop14h 33m
Sat 9/108:12 -
1 stop21h 08m
Deal found 21/10£590
Thu 24/1212:20 -
1 stop14h 46m
Sun 10/112:48 -
1 stop14h 52m
Deal found 21/10£604
Tue 1/1212:20 -
1 stop29h 49m
Tue 8/1211:51 -
1 stop15h 49m
Deal found 17/10£617
Thu 3/1206:30 -
2 stops20h 35m
Thu 10/1214:05 -
1 stop13h 35m
Deal found 19/10£623
Thu 24/1212:20 -
1 stop14h 46m
Sat 9/105:46 -
2 stops21h 54m
Deal found 21/10£653
Tue 3/1106:40 -
3 stops23h 24m
Fri 6/1116:00 -
2 stops19h 30m
Deal found 21/10£654
Tue 10/1111:10 -
2 stops18h 49m
Tue 24/1106:30 -
2 stops17h 00m
Deal found 19/10£687
Thu 24/1214:45 -
2 stops25h 38m
Sun 10/108:57 -
2 stops20h 23m
Deal found 21/10£707
Thu 3/1218:00 -
2 stops35h 59m
Thu 10/1206:15 -
2 stops22h 05m
Deal found 19/10£717
Mon 16/1114:45 -
1 stop16h 04m
Mon 30/1121:47 -
1 stop31h 33m
Deal found 19/10£722
Tue 1/1210:45 -
1 stop34h 58m
Tue 8/1207:20 -
2 stops17h 30m
Deal found 17/10£867
Wed 2/1213:45 -
2 stops29h 48m
Wed 9/1214:45 -
2 stops23h 35m
Deal found 18/10£884

Find flight deals from Heathrow to Idaho

Round-trip from

£590

One-way from

£435

Popular in

August

Cheapest in

January

Average price

£856
Scandinavian Airlines
  • Scandinavian Airlines
  • 1/12-5/12
  • 4 total stops
  • 76h 08m total
  • London to Idaho
Search Deals
12/3-31/12
  • 12/3-31/12
  • 2 total stops
  • 51h 18m total
  • London to Idaho
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£74 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.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Fri 12/3

14:50-11:08

2 stops51h 18m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£435

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Fri 20/11

13:40-13:18

3 stops30h 38m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£501

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 19/11

14:50-11:01

2 stops27h 11m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£509

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

£527

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Sat 21/11

14:50-11:11

2 stops27h 21m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£534

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

£554
Fastest return journey

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Fri 12/3

14:45-22:39

1 stop14h 54m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£574

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Fri 2/4

21:25-00:11

2 stops33h 46m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£589

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

£610

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

£610

Flights are sorted by cheapest return flights first.

Deals found on 20/10

Showing 1-10 of 33 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 £680 and £837 in December.
The cheapest return price found within the last 5 days was £590 on Scandinavian Airlines (1 Dec–5 Dec).

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
13,106 reviews
Check prices

Overall

7.9

Food

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

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
13,106 reviews
Alaska Airlines
7.9
Good
13,106 reviews
Check prices

Overall

7.9

Food

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

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
7.5
Good
697 reviews
Alaska Airlines
7.9
Good
13,106 reviews
Check prices

Overall

7.9

Food

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

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
7.3
Good
10,399 reviews
Alaska Airlines
7.9
Good
13,106 reviews
Check prices

Overall

7.9

Food

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

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
8,285 reviews
Alaska Airlines
7.9
Good
13,106 reviews
Check prices

Overall

7.9

Food

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

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 £654, Scandinavian Airlines can have you in Idaho from London Heathrow Airport in 23h 24m. 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 - 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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Gatwick to San Francisco flights
Stansted to Boston flights
Luton to Los Angeles flights
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Top 4 airlines flying from Heathrow to Idaho

AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£509Average£772FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£526Average£929FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Alaska AirlinesCheapest£719Average£874FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Virgin AtlanticCheapest£720Average£850FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

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