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Cheap flights from London Heathrow Airport to Idaho from £370

LHR — BOI
4 Oct — 11 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

Sat 3/1006:40 -
2 stops19h 00m
Sat 10/1012:08 -
3 stops21h 52m
Deal found 2/9£597
Tue 29/906:40 -
2 stops20h 10m
Tue 6/1013:00 -
2 stops24h 40m
Deal found 30/8£622
Fri 25/906:40 -
2 stops18h 59m
Sat 3/1010:34 -
2 stops24h 56m
Deal found 2/9£622
Thu 15/1011:45 -
2 stops19h 14m
Thu 22/1014:06 -
1 stop14h 14m
Deal found 31/8£636
Tue 29/917:00 -
1 stop13h 25m
Tue 6/1012:42 -
1 stop18h 23m
Deal found 30/8£641
Thu 1/1011:40 -
1 stop18h 45m
Thu 15/1013:38 -
1 stop13h 42m
Deal found 3/9£655
Sat 3/1011:40 -
1 stop19h 19m
Sat 10/1018:04 -
1 stop14h 31m
Deal found 2/9£660
Fri 25/911:40 -
1 stop15h 45m
Sat 3/1014:06 -
1 stop14h 14m
Deal found 2/9£679
Tue 1/1214:30 -
2 stops27h 39m
Tue 8/1212:48 -
2 stops16h 02m
Deal found 31/8£682
Mon 28/914:10 -
2 stops36h 21m
Mon 5/1013:05 -
1 stop14h 05m
Deal found 30/8£687
Wed 28/1011:35 -
2 stops29h 44m
Tue 1/1214:48 -
1 stop11h 52m
Deal found 1/9£688
Mon 30/1114:30 -
2 stops31h 36m
Wed 9/1206:15 -
2 stops17h 55m
Deal found 31/8£689

Find flight deals from Heathrow to Idaho

Round-trip from

£597

One-way from

£370

Popular in

December

Cheapest in

January

Average price

£682
Scandinavian Airlines
  • Scandinavian Airlines
  • 3/10-10/10
  • 5 total stops
  • 40h 52m total
  • London to Idaho
Search Deals
20/10-31/12
  • 20/10-31/12
  • 3 total stops
  • 49h 33m total
  • London to Idaho
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£24 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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Route

Depart

Return

Price

Cheapest return flight

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Sat 31/10

10:25-22:58

1 stop18h 33m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£404

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Mon 14/12

14:50-11:42

3 stops28h 52m

Spokane

Wed 31/12

00:00-09:00

Nonstop0h 00m

£445

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Mon 19/10

06:55-12:28

2 stops36h 33m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£448

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Sun 13/12

20:50-16:08

3 stops51h 18m

Spokane

Wed 31/12

00:00-09:00

Nonstop0h 00m

£452

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Fri 20/11

15:15-11:39

3 stops52h 24m

Spokane

Wed 31/12

00:00-09:00

Nonstop0h 00m

£457

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Sat 7/11

07:50-23:32

2 stops23h 42m

Spokane

Wed 31/12

00:00-09:00

Nonstop0h 00m

£459

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Wed 16/12

06:30-23:47

3 stops25h 17m

Spokane

Wed 31/12

00:00-09:00

Nonstop0h 00m

£464

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Tue 27/10

14:45-17:08

2 stops56h 23m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£464

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Sat 9/1

14:50-15:35

3 stops31h 45m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£474

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 28/10

11:35-21:32

1 stop15h 57m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£494

Flights are sorted by cheapest return flights first.

Deals found on 1/9

Showing 1-10 of 48 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

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 £632). Flying from London Heathrow Airport to Idaho in August is currently the most expensive (average of £1,129). 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?

Airfare is below average for this route at the moment.
London Heathrow Airport to Idaho flights typically cost between £679 and £768 in October.
The cheapest return price found within the last 5 days was £597 on Scandinavian Airlines (3 Oct–10 Oct).

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
12,870 reviews
Check prices

Food

7.0

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.0

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
12,870 reviews
Alaska Airlines
7.9
Good
12,870 reviews
Check prices

Food

7.0

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.0

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
7.4
Good
10,160 reviews
Alaska Airlines
7.9
Good
12,870 reviews
Check prices

Food

7.0

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.0

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
7.4
Good
696 reviews
Alaska Airlines
7.9
Good
12,870 reviews
Check prices

Food

7.0

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.0

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
8,226 reviews
Alaska Airlines
7.9
Good
12,870 reviews
Check prices

Food

7.0

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.0

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 £622, Scandinavian Airlines can have you in Idaho from London Heathrow Airport in 20h 10m. 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 - Boise Air Term. Gowen Fld or London Heathrow - Jackson Hole, London Heathrow - Spokane 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 £632). Flying from London Heathrow Airport to Idaho in August is currently the most expensive (average of £1,129). 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

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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£505Average£762FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£521Average£918FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£713Average£842FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Alaska AirlinesCheapest£730Average£943FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

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