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Cheap flights from London Heathrow Airport to Idaho from £434

LHR — BOI
4 Nov — 11 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

Sun 1/1106:40 -
2 stops23h 24m
Sat 14/1116:10 -
2 stops18h 30m
Deal found 3/10£625
Wed 28/1018:00 -
2 stops47h 31m
Wed 4/1106:30 -
2 stops17h 00m
Deal found 1/10£671
Tue 17/1107:40 -
2 stops22h 53m
Tue 24/1110:34 -
1 stop16h 06m
Deal found 3/10£706
Tue 17/1114:45 -
1 stop16h 04m
Tue 24/1116:20 -
1 stop13h 00m
Deal found 3/10£707
Tue 3/1107:40 -
2 stops22h 53m
Tue 10/1112:31 -
1 stop16h 29m
Deal found 4/10£707
Tue 3/1110:55 -
1 stop19h 03m
Tue 10/1107:00 -
1 stop21h 35m
Deal found 4/10£711
Tue 3/1115:00 -
2 stops34h 03m
Tue 10/1108:28 -
2 stops15h 02m
Deal found 4/10£729
Sun 1/1114:45 -
1 stop16h 04m
Sat 14/1116:16 -
1 stop13h 04m
Deal found 3/10£730
Wed 28/1014:45 -
1 stop15h 14m
Wed 4/1112:49 -
1 stop16h 31m
Deal found 1/10£731
Tue 17/1114:30 -
2 stops33h 12m
Tue 24/1112:00 -
2 stops16h 50m
Deal found 3/10£733
Sat 21/1106:35 -
2 stops21h 40m
Sat 28/1106:20 -
2 stops22h 00m
Deal found 1/10£735
Sat 21/1114:45 -
1 stop16h 14m
Sat 28/1121:59 -
1 stop31h 21m
Deal found 5/10£740

Find flight deals from Heathrow to Idaho

Round-trip from

£625

One-way from

£434

Popular in

December

Cheapest in

January

Average price

£783
Scandinavian Airlines
  • Scandinavian Airlines
  • 1/11-14/11
  • 4 total stops
  • 41h 54m total
  • London to Idaho
Search Deals
22/3-31/12
  • 22/3-31/12
  • 3 total stops
  • 32h 39m total
  • London to Idaho
Search Deals
High demand for flights, 3% 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 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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Route

Depart

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Price

Cheapest return flight

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 6/1

13:25-13:29

2 stops31h 04m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£522

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 6/1

11:10-15:03

3 stops34h 53m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£525

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Sun 21/3

20:35-00:11

2 stops33h 36m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£536

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Fri 2/4

21:25-22:20

2 stops31h 55m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£560

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
Fastest return journey

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 6/1

12:20-18:33

1 stop13h 13m

Boise Air Term. Gowen Fld

Wed 31/12

00:00-08:00

Nonstop0h 00m

£578

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Fri 1/1

09:40-15:18

2 stops36h 38m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£639

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

£726

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Fri 29/1

14:45-09:16

2 stops25h 31m

Boise Air Term. Gowen Fld

Mon 1/2

08:12-12:20

1 stop21h 08m

£737

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

£741

Flights are sorted by cheapest return flights first.

Deals found on 5/10

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 £648 and £874 in November.
The cheapest return price found within the last 5 days was £625 on Scandinavian Airlines (1 Nov–14 Nov).

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
13,017 reviews
Check prices

Overall

7.9

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.0

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
13,017 reviews
Alaska Airlines
7.9
Good
13,017 reviews
Check prices

Overall

7.9

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.0

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
7.4
Good
10,289 reviews
Alaska Airlines
7.9
Good
13,017 reviews
Check prices

Overall

7.9

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.0

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
7.4
Good
693 reviews
Alaska Airlines
7.9
Good
13,017 reviews
Check prices

Overall

7.9

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.0

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
8,259 reviews
Alaska Airlines
7.9
Good
13,017 reviews
Check prices

Overall

7.9

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.0

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 £726, Alaska Airlines can have you in Idaho from London Heathrow Airport in 31h 36m. 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 - Boise Air Term. Gowen Fld or London Heathrow - Hailey Sun Valley-Friedman, 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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Heathrow to O'Hare Intl flights
Stansted to Miami flights
London City to Miami flights
Heathrow to Dulles Intl flights
Heathrow to Atlanta flights
Stansted to Orlando flights
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Luton to Miami flights
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Gatwick to Los Angeles flights
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Gatwick to Dallas/Fort Worth flights
Stansted to Los Angeles flights
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Luton to Orlando flights
Heathrow to Fort Lauderdale flights
London City to San Francisco flights
Stansted to Dallas/Fort Worth flights
London City to Boston flights
Heathrow to Charlotte flights
Gatwick to Boston flights
Heathrow to Tampa flights
Stansted to San Francisco flights

Top 4 airlines flying from Heathrow to Idaho

AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£515Average£780FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£532Average£939FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Alaska AirlinesCheapest£727Average£884FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Virgin AtlanticCheapest£728Average£832FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

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