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Cheap flights from London to Idaho Falls from £409

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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — IDA
30 Mar — 6 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Idaho Falls

Enter your travel dates to find the best prices.

Cheapest flights from London to Idaho Falls
Explore the most affordable flight options available from London to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 February 2026.

Tue 1/906:15
LHR
-
IDA
2 stops18h 59m
Multiple Airlines
Fri 25/918:50
IDA
-
LHR
1 stop32h 10m
Multiple Airlines
Deal found 28/2£770
Tue 1/906:15
LHR
-
IDA
2 stops18h 59m
Delta
Fri 25/918:50
IDA
-
LHR
2 stops18h 20m
Delta
Deal found 28/2£777
Tue 1/917:00
LHR
-
IDA
1 stop29h 29m
Alaska Airlines
Fri 25/916:03
IDA
-
LHR
1 stop16h 02m
Alaska Airlines
Deal found 26/2£782
Tue 1/908:55
LHR
-
IDA
1 stop19h 24m
American Airlines
Fri 25/913:44
IDA
-
LHR
1 stop15h 31m
American Airlines
Deal found 28/2£786
Sun 12/408:55
LHR
-
IDA
2 stops21h 44m
British Airways
Sun 19/413:43
IDA
-
LHR
2 stops34h 57m
British Airways
Deal found 26/2£795
Sun 12/410:55
LHR
-
IDA
1 stop18h 21m
KLM
Sun 19/418:58
IDA
-
LHR
1 stop32h 02m
KLM
Deal found 26/2£809
Sun 12/410:05
LHR
-
IDA
1 stop20h 34m
American Airlines
Sun 19/413:43
IDA
-
LHR
2 stops15h 32m
American Airlines
Deal found 26/2£821
Tue 1/913:00
LGW
-
IDA
2 stops16h 39m
Multiple Airlines
Fri 25/916:03
IDA
-
LGW
2 stops15h 37m
Multiple Airlines
Deal found 28/2£1,421

Find flight deals from London to Idaho Falls

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Idaho Falls (IDA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 28 February 2026.

Round-trip from

£795

One-way from

£409
British Airways
  • British Airways
  • 12/4-19/4
  • 4 total stops
  • 56h 41m total
  • London to Idaho Falls
Search Deals
9/4
  • 9/4
  • 2 total stops
  • 32h 27m total
  • London to Idaho Falls
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Idaho Falls 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 28 February 2026.
Use the filters below to find and compare flights from London to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sun 12/4

10:55-22:16

1 stop18h 21m

Idaho Falls Fanning Field

Sun 19/4

18:58-10:00

1 stop32h 02m

£809

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sun 12/4

10:05-23:39

1 stop20h 34m

Idaho Falls Fanning Field

Sun 19/4

13:43-12:15

2 stops15h 32m

£821

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 11/4

10:00-21:04

2 stops18h 04m

Idaho Falls Fanning Field

Sat 18/4

14:30-21:35

2 stops24h 05m

£917

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Fri 10/4

06:15-18:15

2 stops19h 00m

Idaho Falls Fanning Field

Fri 17/4

18:58-06:25

2 stops52h 27m

£918

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Fri 10/4

16:10-23:39

1 stop14h 29m

Idaho Falls Fanning Field

Fri 17/4

13:43-14:25

1 stop17h 42m

£938

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sun 12/7

12:55-21:57

1 stop16h 02m

Idaho Falls Fanning Field

Sun 19/7

07:00-10:55

1 stop20h 55m

£993

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 10/3

14:30-18:15

2 stops33h 45m

Idaho Falls Fanning Field

Tue 17/3

13:10-11:55

2 stops16h 45m

£1,053

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Thu 9/4

14:00-15:27

2 stops32h 27m

£409

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Thu 9/4

06:30-15:27

3 stops39h 57m

£472

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Thu 9/4

11:25-09:53

1 stop29h 28m

£727

Flights are sorted by cheapest return flights first.

Deals found on 25/2

Sorted by cheapest first

Best time to book a flight from London to Idaho Falls

Have a flexible travel schedule? Discover the best time to fly to Idaho Falls 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 Falls

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

Currently, September is the cheapest month in which you can book a flight from London to Idaho Falls (average of £576). Flying from London to Idaho Falls in December is currently the most expensive (average of £1,013). 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.

What’s the top stopover airport for flights from London to Idaho Falls?

Share of one-stop return flights from London to Idaho Falls chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Denver (DEN) – chosen by Cheapflights users on 54% of one-stop itineraries from London to Idaho Falls on Cheapflights.

What’s the cheapest stopover airport for flights from London to Idaho Falls?

Average return fare for one-stop flights from London to Idaho Falls, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Dallas (DFW) is the most affordable one-stop option, with an average return flight price of £732.

What’s the fastest stopover option from London to Idaho Falls?

Shortest average travel time for one-stop one-way flights from London to Idaho Falls, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Denver (DEN) have the shortest average one-way travel time for one-stop routes: 13h 02m.

Which airport typically offers the quickest stopover for flights from London to Idaho Falls?

Average stopover duration for one-stop one-way flights from London to Idaho Falls, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Denver (DEN) offer the fastest connection on this route, with an average stopover time of 1h 31m.

Reviews of airlines servicing Idaho Falls

Get insights into the airlines that provide service to Idaho Falls. 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 Falls. Reviews last updated 28 February 2026.
Read through reviews of airlines operating flights from London to Idaho Falls, such as Virgin Atlantic and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
680 reviews
Check prices

Overall

7.5

Entertainment

7.6

Food

6.9

Crew

8.2

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Virgin Atlantic
7.5
Good
680 reviews
Virgin Atlantic
7.5
Good
680 reviews
Check prices

Overall

7.5

Entertainment

7.6

Food

6.9

Crew

8.2

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
United Airlines
7.4
Good
9,365 reviews
Virgin Atlantic
7.5
Good
680 reviews
Check prices

Overall

7.5

Entertainment

7.6

Food

6.9

Crew

8.2

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Related info for your journey

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

  • What airport do you fly into for flights to Idaho Falls from London?

    For a flight from London to Idaho Falls, you will be flying into Fanning Field. Idaho Falls Fanning Field (IDA) is just 3.8 mi from the center of the city. Fanning Field is the only Idaho Falls airport and it handles 0 inbound flights from London per day. 1 airline has flights to Idaho Falls Fanning Field from London on a regular basis.

  • How long is the flight from London to Idaho Falls?

    For as low as £917, KLM can have you in Idaho Falls from London in 18h 04m. There are 4705 mi between London and Idaho Falls. Both multi-stop and direct flights can be found to your destination and back.

  • What is the cheapest airline to fly from London to Idaho Falls round-trip?

    Our cheapest airline available from London to Idaho Falls is United Airlines. Our recent data shows that you can find tickets from as low as £755 on this airline.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from London to Idaho Falls 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 Falls?

    Currently, September is the cheapest month in which you can book a flight from London to Idaho Falls (average of £576). Flying from London to Idaho Falls in December is currently the most expensive (average of £1,013). 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

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Top airline flying from London to Idaho Falls

Discover the top airline that operate flights from London to Idaho Falls. 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 28 February 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£755Average£1,032FlexibilityNo cancel feeOn-time69%
Search United Airlines 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 Falls?

Deals for London to Idaho Falls 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 Falls?

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

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

Certainly. Search results for flights to Idaho Falls from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Idaho Falls from London today and book when prices fit your budget.

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