How long is the flight from London to Idaho Falls?

For as low as £710, Alaska Airlines can have you in Idaho Falls from London in 29h 20m. There are 4705 mi between London and Idaho Falls.

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 £1,031 on this airline.

In terms of precipitation, rainfall in Idaho Falls ranges from 15.0 - 51.0 inches per month. May is typically the wettest month, when rainfall can reach 51.0 mm. July is typically the driest time to visit Idaho Falls when rainfall is around 15.0 mm.

If weather is an important factor for your trip to Idaho Falls, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

What is the cheapest time of day to fly from LON to IDA?

When flying from London to Idaho Falls, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

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.

£524+ Cheap Flights from London to Idaho Falls

Cheap flight deals from London to Idaho Falls

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

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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 6 September 2026.

Fri 2/1017:00 -

1 stop29h 20m

Fri 9/1013:58 -

1 stop18h 07m

Deal found 4/9£710

Fri 2/1011:40 -

1 stop18h 16m

Fri 9/1013:58 -

1 stop18h 37m

Deal found 4/9£765

Fri 20/1114:45 -

1 stop15h 12m

Sat 28/1106:02 -

1 stop23h 18m

Deal found 5/9£816

Sat 17/1017:00 -

1 stop29h 20m

Sat 24/1006:09 -

1 stop24h 11m

Deal found 2/9£851

Fri 20/1120:25 -

2 stops32h 57m

Sat 28/1113:11 -

1 stop13h 49m

Deal found 5/9£855

Fri 2/1009:20 -

2 stops20h 02m

Fri 9/1018:56 -

2 stops29h 14m

Deal found 4/9£889

Fri 20/1117:00 -

2 stops27h 13m

Sat 28/1108:00 -

2 stops31h 10m

Deal found 5/9£915

Fri 2/1014:45 -

1 stop28h 00m

Fri 9/1013:50 -

1 stop14h 00m

Deal found 4/9£922

Sat 17/1011:40 -

2 stops17h 30m

Sat 24/1013:05 -

2 stops36h 40m

Deal found 2/9£942

Fri 20/1111:55 -

2 stops18h 02m

Sat 28/1106:02 -

2 stops21h 53m

Deal found 5/9£1,053

Sat 17/1015:40 -

2 stops38h 19m

Sat 24/1013:58 -

2 stops17h 42m

Deal found 2/9£1,255

Find flight deals from London to Idaho Falls

Round-trip from	£710
One-way from	£524

Alaska Airlines
2/10-9/10
2 total stops
47h 27m total
London to Idaho Falls

Search Deals

28/12-31/12
2 total stops
18h 50m total
London to Idaho Falls

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonIdaho Falls

LGW London Gatwick - IDA Idaho Falls Fanning Field

LGWIDA

London Gatwick

Mon 28/12

11:55-23:45

2 stops18h 50m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£524

LondonIdaho Falls

LGW London Gatwick - IDA Idaho Falls Fanning Field

LGWIDA

London Gatwick

Thu 31/12

11:55-23:45

2 stops18h 50m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£564

Fastest return journey

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Mon 28/12

14:45-23:45

1 stop16h 00m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£603

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Mon 28/12

13:15-23:46

1 stop17h 31m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£616

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Tue 15/9

07:40-22:56

3 stops22h 16m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£618

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Fri 1/1

09:05-12:28

2 stops34h 23m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£619

LondonIdaho Falls

LGW London Gatwick - IDA Idaho Falls Fanning Field

LGWIDA

London Gatwick

Wed 30/12

11:55-15:18

2 stops34h 23m

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

Sun 27/12

14:45-23:45

1 stop16h 00m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£645

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Sun 27/12

07:30-21:46

2 stops21h 16m

Idaho Falls Fanning Field

Wed 31/12

00:00-08:00

Nonstop0h 00m

£652

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Fri 2/10

17:00-15:20

1 stop29h 20m

Idaho Falls Fanning Field

Fri 9/10

13:58-15:05

1 stop18h 07m

£710

Flights are sorted by cheapest return flights first.

Deals found on 5/9

Showing 1-10 of 15 resultsSorted 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.

LON-IDA

LHR-IDA

LGW-IDA

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

LON-IDA

LHR-IDA

LGW-IDA

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

Denver (DEN) – chosen by Cheapflights users on 67% of one-stop itineraries from London to Idaho Falls on Cheapflights.

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

Seattle (SEA) is the most affordable one-stop option, with an average return flight price of £763.

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

Flights via Denver (DEN) have the shortest average one-way travel time for one-stop routes: 12h 54m.

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

Flights via Denver (DEN) offer the fastest connection on this route, with an average stopover time of 1h 05m.

Related info for your journey

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 £710, Alaska Airlines can have you in Idaho Falls from London in 29h 20m. There are 4705 mi between London and Idaho Falls.
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 £1,031 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.

See more FAQs

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Alternative routes for London to Idaho Falls

Top airline flying from London to Idaho Falls

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest£1,031	Average£1,140	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

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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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Cheap flights from London to Idaho Falls from £524

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 28/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from London to Idaho Falls

Cheapest flights from London to Idaho FallsExplore 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 6 September 2026.

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 6 September 2026.

Best flights from London to Idaho FallsDiscover carefully curated flight deals from London to Idaho Falls that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 6 September 2026.

Discover carefully curated flight deals from London to Idaho Falls that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 6 September 2026.

Last-minute flights from London to Idaho FallsDiscover last-minute flight deals from London to Idaho Falls. Data last updated 6 September 2026 and is based on user searches.

Discover last-minute flight deals from London to Idaho Falls. Data last updated 6 September 2026 and is based on user searches.

One-way flights from London to Idaho FallsSearch for one-way flight options from London to Idaho Falls. Find affordable one-way fares based on user searches. Data last updated 6 September 2026.

Search for one-way flight options from London to Idaho Falls. Find affordable one-way fares based on user searches. Data last updated 6 September 2026.

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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.

Cheapflights Insights

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 67% 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.

Seattle (SEA) is the most affordable one-stop option, with an average return flight price of £763.

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: 12h 54m.

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 05m.

Related info for your journey

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

How long is the flight from London to Idaho Falls?

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

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Complete your trip

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London and Idaho Falls flights

Browse other London and Idaho Falls flight options. Last updated on 6 September 2026.

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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 6 September 2026.

Best flights from London to Idaho Falls
Discover carefully curated flight deals from London to Idaho Falls that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 6 September 2026.

Last-minute flights from London to Idaho Falls
Discover last-minute flight deals from London to Idaho Falls. Data last updated 6 September 2026 and is based on user searches.

One-way flights from London to Idaho Falls
Search for one-way flight options from London to Idaho Falls. Find affordable one-way fares based on user searches. Data last updated 6 September 2026.