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Cheap flights from London Heathrow Airport to Idaho from £405

LHR — BOI
7 Dec — 14 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

Thu 10/1212:15 -
2 stops16h 59m
Thu 24/1220:46 -
2 stops39h 44m
Deal found 5/11£573
Wed 9/1214:45 -
1 stop16h 14m
Sun 10/106:37 -
1 stop22h 43m
Deal found 5/11£635
Thu 3/1214:45 -
1 stop27h 24m
Thu 10/1211:51 -
1 stop17h 29m
Deal found 5/11£714
Fri 4/1214:45 -
1 stop27h 24m
Fri 11/1211:51 -
1 stop17h 29m
Deal found 6/11£717
Mon 23/1114:45 -
1 stop27h 11m
Sat 12/1211:51 -
1 stop17h 29m
Deal found 7/11£728
Thu 3/1214:45 -
1 stop15h 11m
Thu 10/1213:54 -
1 stop15h 26m
Deal found 4/11£728
Mon 23/1114:45 -
1 stop27h 11m
Wed 23/1219:59 -
1 stop33h 21m
Deal found 7/11£733
Thu 10/1214:45 -
1 stop16h 14m
Thu 24/1217:00 -
1 stop12h 20m
Deal found 5/11£738
Wed 9/1206:35 -
2 stops21h 55m
Sun 10/116:10 -
2 stops34h 30m
Deal found 5/11£746
Sat 21/1114:45 -
1 stop28h 37m
Sat 28/1106:33 -
1 stop22h 47m
Deal found 3/11£749
Tue 8/1214:45 -
1 stop31h 22m
Fri 11/1206:00 -
1 stop23h 20m
Deal found 7/11£754
Sat 21/1120:35 -
2 stops33h 25m
Sat 28/1106:33 -
2 stops21h 17m
Deal found 3/11£800

Find flight deals from Heathrow to Idaho

Round-trip from

£573

One-way from

£405

Popular in

August

Cheapest in

April

Average price

£731
10/12-24/12
  • 10/12-24/12
  • 4 total stops
  • 56h 43m total
  • London to Idaho
Search Deals
United Airlines
  • United Airlines
  • 12/4-31/12
  • 1 total stop
  • 15h 41m 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 (£19 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 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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Depart

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Price

Cheapest return flight

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Sun 21/3

20:35-23:58

2 stops33h 23m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£581

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 6/1

16:00-13:26

1 stop28h 26m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£591

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Fri 2/4

21:25-22:20

2 stops55h 55m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£606

LondonHailey

LHR London Heathrow - SUN Hailey Sun Valley-Friedman

LHRSUN

London Heathrow

Thu 1/4

13:05-09:38

2 stops27h 33m

Hailey Sun Valley-Friedman

Wed 31/12

00:00-08:00

Nonstop0h 00m

£621

LondonHailey

LHR London Heathrow - SUN Hailey Sun Valley-Friedman

LHRSUN

London Heathrow

Wed 31/3

06:30-22:02

2 stops22h 32m

Hailey Sun Valley-Friedman

Wed 31/12

00:00-08:00

Nonstop0h 00m

£627

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

LondonHailey

LHR London Heathrow - SUN Hailey Sun Valley-Friedman

LHRSUN

London Heathrow

Wed 31/3

17:00-09:38

1 stop23h 38m

Hailey Sun Valley-Friedman

Wed 31/12

00:00-08:00

Nonstop0h 00m

£630

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 7/4

16:15-23:41

1 stop14h 26m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£632
Fastest return journey

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Fri 2/4

17:00-23:56

1 stop13h 56m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£651

LondonHailey

LHR London Heathrow - SUN Hailey Sun Valley-Friedman

LHRSUN

London Heathrow

Thu 1/4

06:15-22:02

2 stops22h 47m

Hailey Sun Valley-Friedman

Wed 31/12

00:00-08:00

Nonstop0h 00m

£678

Flights are sorted by cheapest return flights first.

Deals found on 3/11

Showing 1-10 of 38 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 £729 and £809 in December.
The cheapest return price found within the last 5 days was £573 on Multiple Airlines (10 Dec–24 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
13,153 reviews
Check prices

Boarding

8.1

Comfort

7.8

Overall

7.9

Entertainment

7.0

Crew

8.5

Food

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
13,153 reviews
Alaska Airlines
7.9
Good
13,153 reviews
Check prices

Boarding

8.1

Comfort

7.8

Overall

7.9

Entertainment

7.0

Crew

8.5

Food

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
698 reviews
Alaska Airlines
7.9
Good
13,153 reviews
Check prices

Boarding

8.1

Comfort

7.8

Overall

7.9

Entertainment

7.0

Crew

8.5

Food

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
10,475 reviews
Alaska Airlines
7.9
Good
13,153 reviews
Check prices

Boarding

8.1

Comfort

7.8

Overall

7.9

Entertainment

7.0

Crew

8.5

Food

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
8,297 reviews
Alaska Airlines
7.9
Good
13,153 reviews
Check prices

Boarding

8.1

Comfort

7.8

Overall

7.9

Entertainment

7.0

Crew

8.5

Food

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 £734, Alaska Airlines can have you in Idaho from London Heathrow Airport in 19h 30m. 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 - Hailey Sun Valley-Friedman or London Heathrow - Boise Air Term. Gowen Fld, 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.

See more FAQs

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Alternative routes for Heathrow to Idaho

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Gatwick to Newark flights
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Heathrow to Orlando flights
Heathrow to Boston flights
Heathrow to Dallas/Fort Worth flights
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Gatwick to Miami flights
Heathrow to Dulles Intl flights
Stansted to Miami flights
London City to Miami flights
Gatwick to Orlando flights
Heathrow to Seattle flights
Heathrow to Baltimore flights
Heathrow to O'Hare Intl flights
Luton to Miami flights
Heathrow to Hobby flights
Gatwick to Los Angeles flights
Heathrow to Atlanta flights
London City to Los Angeles flights
Stansted to Los Angeles flights
Heathrow to Ontario flights
Heathrow to George Bush Intcntl flights
Heathrow to Tampa flights
London City to Boston flights
Gatwick to Boston flights
Stansted to Orlando flights
London City to Orlando flights
Luton to Los Angeles flights
Stansted to Boston flights
Gatwick to San Francisco flights
London City to San Francisco flights
Heathrow to Denver flights
Gatwick to Dulles Intl flights
Gatwick to Fort Lauderdale flights
Stansted to San Francisco flights
Heathrow to Fort Lauderdale flights
Stansted to Dulles Intl flights

Top 4 airlines flying from Heathrow to Idaho

AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£509Average£772FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£526Average£946FlexibilityNo 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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