Find flights
When to book
Airlines
FAQs

Cheap flights from London to Idaho from £358

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 28/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BOI
2 Apr — 9 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Idaho

Enter your travel dates to find the best prices.

Cheapest flights from London to Idaho
Explore the most affordable flight options available from London to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 March 2026.

Fri 1/508:00
LHR
-
GEG
1 stop18h 36m
United Airlines
Tue 5/507:10
GEG
-
LHR
1 stop17h 50m
United Airlines
Deal found 28/2£465
Tue 14/408:45
LHR
-
BOI
2 stops21h 17m
Multiple Airlines
Tue 21/407:40
BOI
-
LHR
2 stops19h 30m
Multiple Airlines
Deal found 28/2£496
Thu 30/413:00
LGW
-
GEG
2 stops16h 31m
Multiple Airlines
Tue 5/505:00
GEG
-
LGW
2 stops25h 40m
Multiple Airlines
Deal found 28/2£525
Wed 15/406:55
LHR
-
GEG
2 stops22h 16m
Lufthansa
Wed 22/412:35
GEG
-
LHR
1 stop14h 35m
Lufthansa
Deal found 1/3£563
Mon 20/407:25
LHR
-
BOI
2 stops19h 28m
United Airlines
Mon 27/406:15
BOI
-
LHR
2 stops16h 40m
United Airlines
Deal found 2/3£573
Wed 15/407:25
LHR
-
GEG
2 stops19h 26m
United Airlines
Wed 22/407:10
GEG
-
LHR
2 stops19h 30m
United Airlines
Deal found 1/3£574
Mon 13/409:00
LHR
-
BOI
2 stops31h 54m
United Airlines
Mon 27/412:30
BOI
-
LHR
1 stop18h 40m
United Airlines
Deal found 2/3£576
Mon 4/508:40
LHR
-
GEG
2 stops21h 00m
United Airlines
Sun 10/512:25
GEG
-
LHR
1 stop35h 00m
United Airlines
Deal found 28/2£577
Mon 13/414:50
LHR
-
BOI
1 stop13h 32m
Lufthansa
Mon 20/410:35
BOI
-
LHR
1 stop16h 05m
Lufthansa
Deal found 26/2£578
Mon 13/411:25
LHR
-
BOI
1 stop13h 40m
Lufthansa
Mon 27/414:37
BOI
-
LHR
1 stop12h 03m
Lufthansa
Deal found 2/3£580
Mon 27/407:25
LHR
-
BOI
2 stops22h 37m
United Airlines
Sun 3/516:20
BOI
-
LHR
1 stop32h 05m
United Airlines
Deal found 28/2£581
Thu 23/407:25
LHR
-
GEG
2 stops22h 10m
Lufthansa
Mon 27/412:35
GEG
-
LHR
1 stop14h 35m
Lufthansa
Deal found 27/2£594

Find flight deals from London to Idaho

Keep the following information in mind while searching for London to Idaho flight deals. Data was last updated 3 March 2026.

Round-trip from

£465

One-way from

£358

Popular in

December

Cheapest in

January

Average price

£624
United Airlines
  • United Airlines
  • 1/5-5/5
  • 2 total stops
  • 36h 26m total
  • London to Idaho
Search Deals
28/4
  • 28/4
  • 3 total stops
  • 22h 49m total
  • London to Idaho
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£50 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£30 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Idaho that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 3 March 2026.
Use the filters below to find and compare flights from London to Idaho that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 15/4

07:25-18:51

2 stops19h 26m

Spokane

Wed 22/4

07:10-10:40

2 stops19h 30m

£574

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 20/4

07:30-19:53

2 stops19h 23m

Boise Air Term. Gowen Fld

Mon 27/4

09:26-11:10

1 stop18h 44m

£574

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 13/4

09:30-21:22

2 stops18h 52m

Boise Air Term. Gowen Fld

Mon 20/4

17:29-12:20

1 stop11h 51m

£576

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 4/5

08:40-21:40

2 stops21h 00m

Spokane

Sun 10/5

05:00-07:40

2 stops42h 40m

£578

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 27/4

07:25-23:02

2 stops22h 37m

Boise Air Term. Gowen Fld

Sun 3/5

16:20-07:25

1 stop32h 05m

£581

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 16/4

07:25-21:35

2 stops22h 10m

Spokane

Thu 23/4

07:10-06:55

2 stops15h 45m

£603

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 17/4

14:30-22:52

1 stop16h 22m

Spokane

Fri 24/4

07:09-10:15

1 stop19h 06m

£613

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 23/4

07:25-21:11

2 stops21h 46m

Spokane

Mon 27/4

05:05-10:00

2 stops20h 55m

£614

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Mon 27/4

10:20-23:02

2 stops19h 42m

Boise Air Term. Gowen Fld

Sun 3/5

09:02-14:40

2 stops22h 38m

£651

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Mon 20/4

15:40-22:57

2 stops38h 17m

Boise Air Term. Gowen Fld

Mon 27/4

16:38-14:40

2 stops39h 02m

£672

Flights are sorted by cheapest return flights first.

Deals found on 26/2

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight from London to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from London with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London to Idaho

What is the cheapest month to book a flight from London to Idaho?

Currently, March is the cheapest month in which you can book a flight from London to Idaho (average of £511). Flying from London to Idaho in February is currently the most expensive (average of £712). 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.

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Idaho. Reviews last updated 3 March 2026.
Get a feel of what it's like to fly with KLM, Virgin Atlantic, andUnited Airlines from London to Idaho by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,461 reviews
Check prices

Crew

8.4

Comfort

7.6

Food

7.3

Entertainment

7.1

Overall

7.7

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.7
Good
1,461 reviews
KLM
7.7
Good
1,461 reviews
Check prices

Crew

8.4

Comfort

7.6

Food

7.3

Entertainment

7.1

Overall

7.7

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Virgin Atlantic
7.5
Good
680 reviews
KLM
7.7
Good
1,461 reviews
Check prices

Crew

8.4

Comfort

7.6

Food

7.3

Entertainment

7.1

Overall

7.7

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
United Airlines
7.4
Good
9,378 reviews
KLM
7.7
Good
1,461 reviews
Check prices

Crew

8.4

Comfort

7.6

Food

7.3

Entertainment

7.1

Overall

7.7

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Icelandair
7.1
Good
617 reviews
KLM
7.7
Good
1,461 reviews
Check prices

Crew

8.4

Comfort

7.6

Food

7.3

Entertainment

7.1

Overall

7.7

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Lufthansa
6.8
Okay
7,821 reviews
KLM
7.7
Good
1,461 reviews
Check prices

Crew

8.4

Comfort

7.6

Food

7.3

Entertainment

7.1

Overall

7.7

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

Related info for your journey

Find useful and relevant information for your journey from London to Idaho. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from London to Idaho?

    Airlines like United Airlines, Icelandair, and Virgin Atlantic fly from London to Idaho in about 18h 02m. The time it takes to get you to your destination can typically vary by up to 20h 15m. The distance from London to Idaho is about 4705 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most popular routes from London to Idaho?

    While some choose either London Heathrow - Boise Air Term. Gowen Fld or London Heathrow - Spokane, London Heathrow - Jackson Hole is the most popular route from London to Idaho.

  • Can I find deals for flights from London to Idaho that include hotel bookings?

    Yes. In addition to deals on London to Idaho flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Idaho?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Idaho.

  • Can I find deals for business class flights from London to Idaho?

    Yes. Cheapflights offers flight deals from London 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 to Idaho?

    Currently, March is the cheapest month in which you can book a flight from London to Idaho (average of £511). Flying from London to Idaho in February is currently the most expensive (average of £712). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to John F Kennedy Intl flights
Heathrow to Newark flights
Heathrow to LaGuardia flights
Gatwick to John F Kennedy Intl flights
Heathrow to Orlando flights
Gatwick to Newark flights
London City to John F Kennedy Intl flights
Stansted to John F Kennedy Intl flights
Heathrow to Los Angeles flights
Heathrow to Miami flights
Gatwick to LaGuardia flights
Heathrow to Boston flights
Heathrow to San Francisco flights
Manchester to Orlando flights
Manchester to John F Kennedy Intl flights
Luton to John F Kennedy Intl flights
Gatwick to Orlando flights
Heathrow to Las Vegas flights
Heathrow to Hobby flights
London City to Newark flights
Heathrow to O'Hare Intl flights
Stansted to Newark flights
Luton to Newark flights
Heathrow to Dallas/Fort Worth flights
Heathrow to Seattle flights
Stansted to Los Angeles flights
Heathrow to Dulles Intl flights
Edinburgh to John F Kennedy Intl flights
Gatwick to Los Angeles flights
Gatwick to Boston flights
Heathrow to George Bush Intcntl flights
Heathrow to Tampa flights
Heathrow to Baltimore flights
Edinburgh to Newark flights
Heathrow to Atlanta flights
Stansted to Orlando flights
Gatwick to Miami flights
London City to Miami flights
London City to Los Angeles flights
Manchester to Newark flights
Heathrow to Ontario flights
Stansted to Miami flights
Heathrow to Nashville flights
Edinburgh to Boston flights
Heathrow to Denver flights
London City to Hobby flights
Stansted to Boston flights
London City to Boston flights
Gatwick to Hobby flights
Manchester to LaGuardia flights

Top 3 airlines flying from London to Idaho

Discover the top 3 airlines that operate flights from London to Idaho. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 3 March 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£543Average£668FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£547Average£859FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£600Average£787FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to Idaho?

Deals for London to Idaho flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from London to Idaho?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from London to Idaho for you. Better yet — we are completely free to use.

Can Cheapflights find flights from London to Idaho with no change fees?

Yes, we can. To see specific flights from London to Idaho with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from London to Idaho become cheaper?

Of course! You can now track prices for flights from London to Idaho and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.