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Cheap flights from London Heathrow Airport to Idaho from £407

LHR — BOI
8 Oct — 15 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

Thu 15/1011:45 -
2 stops19h 14m
Tue 27/1014:06 -
1 stop14h 34m
Deal found 5/9£547
Thu 15/1011:45 -
2 stops20h 10m
Wed 28/1013:38 -
1 stop14h 02m
Deal found 5/9£548
Fri 23/1017:45 -
1 stop14h 10m
Wed 28/1007:20 -
1 stop20h 20m
Deal found 6/9£593
Fri 2/1006:40 -
2 stops20h 10m
Fri 9/1013:00 -
3 stops21h 30m
Deal found 4/9£596
Thu 1/1011:40 -
1 stop18h 45m
Thu 15/1013:38 -
1 stop13h 42m
Deal found 3/9£654
Thu 15/1017:00 -
1 stop13h 59m
Tue 27/1014:06 -
1 stop16h 14m
Deal found 5/9£656
Sun 13/1212:15 -
2 stops20h 03m
Mon 28/1206:00 -
2 stops29h 30m
Deal found 4/9£665
Mon 14/1212:20 -
1 stop16h 51m
Tue 29/1213:21 -
1 stop13h 19m
Deal found 7/9£666
Tue 15/1212:20 -
1 stop16h 51m
Sun 27/1213:21 -
1 stop13h 19m
Deal found 6/9£683
Fri 30/1014:45 -
1 stop15h 14m
Tue 3/1120:59 -
1 stop32h 21m
Deal found 5/9£686
Mon 26/1012:20 -
1 stop16h 05m
Tue 3/1112:41 -
1 stop13h 59m
Deal found 4/9£690
Sat 3/1011:40 -
1 stop13h 37m
Sat 10/1014:06 -
1 stop14h 14m
Deal found 3/9£700

Find flight deals from Heathrow to Idaho

Round-trip from

£547

One-way from

£407

Popular in

December

Cheapest in

January

Average price

£683
15/10-27/10
  • 15/10-27/10
  • 3 total stops
  • 33h 48m total
  • London to Idaho
Search Deals
31/10-31/12
  • 31/10-31/12
  • 2 total stops
  • 30h 04m 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

Fri 30/10

12:10-14:54

3 stops56h 44m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£423

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Fri 11/12

07:40-00:18

2 stops24h 38m

Spokane

Wed 31/12

00:00-09:00

Nonstop0h 00m

£446

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

£447

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

£451

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Sat 31/10

11:55-22:57

1 stop17h 02m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£466

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 6/1

11:10-13:30

3 stops33h 20m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£502

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 6/1

14:30-15:03

2 stops31h 33m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£508

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Sun 13/12

14:45-00:18

1 stop17h 33m

Spokane

Wed 31/12

00:00-09:00

Nonstop0h 00m

£515

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Fri 11/12

06:35-17:57

2 stops19h 22m

Spokane

Wed 31/12

00:00-09:00

Nonstop0h 00m

£521

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Fri 11/12

14:45-22:57

1 stop16h 12m

Spokane

Wed 31/12

00:00-09:00

Nonstop0h 00m

£531

Flights are sorted by cheapest return flights first.

Deals found on 4/9

Showing 1-10 of 50 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 £631). Flying from London Heathrow Airport to Idaho in August is currently the most expensive (average of £1,128). 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 £738 and £775 in October.
The cheapest return price found within the last 5 days was £547 on Multiple Airlines (15 Oct–27 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
12,892 reviews
Check prices

Entertainment

7.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Food

7.0

Overall

7.9

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
12,892 reviews
Alaska Airlines
7.9
Good
12,892 reviews
Check prices

Entertainment

7.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Food

7.0

Overall

7.9

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
10,180 reviews
Alaska Airlines
7.9
Good
12,892 reviews
Check prices

Entertainment

7.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Food

7.0

Overall

7.9

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
12,892 reviews
Check prices

Entertainment

7.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Food

7.0

Overall

7.9

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
8,216 reviews
Alaska Airlines
7.9
Good
12,892 reviews
Check prices

Entertainment

7.0

Boarding

8.1

Crew

8.5

Comfort

7.8

Food

7.0

Overall

7.9

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 £656, 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 - 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 £631). Flying from London Heathrow Airport to Idaho in August is currently the most expensive (average of £1,128). 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

Alternative routes for Heathrow to Idaho

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Stansted to LaGuardia flights
Gatwick to Las Vegas flights
London City to San Francisco flights
Luton to Orlando flights
London City to O'Hare Intl flights
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Stansted to San Francisco flights
Heathrow to Sky Harbor Intl flights

Top 4 airlines flying from Heathrow to Idaho

AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£504Average£760FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£520Average£916FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£669Average£861FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Alaska AirlinesCheapest£729Average£942FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

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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.

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