How long is the flight from London Heathrow Airport to Idaho Falls?

Departing from London Heathrow Airport to Idaho Falls will take you 15h 09m. Airlines will cover a distance of 4705 mi.

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 LHR to IDA?

When flying from London Heathrow Airport 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 Heathrow?

Located just 3.8 mi from the city center, Idaho Falls Fanning Field is the airport most travelers will use when flying to Idaho Falls from London Heathrow. Booking flights from London Heathrow to Fanning Field (IDA) should be relatively easy as there are 0 daily inbound flights from London Heathrow from 1 airline.

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

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

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

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

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

Yes. Cheapflights offers flight deals from Heathrow 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.

£725+ Cheap Flights from London Heathrow Airport to Idaho Falls

Cheap flight deals from Heathrow to Idaho Falls

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

Cheapest flights from Heathrow to Idaho Falls
Explore the most affordable flight options available from Heathrow to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 October 2026.

Sun 15/1114:45 -

1 stop15h 09m

Wed 2/1213:54 -

1 stop15h 26m

Deal found 6/10£725

Tue 17/1114:45 -

1 stop31h 33m

Tue 1/1206:00 -

1 stop23h 20m

Deal found 6/10£826

Mon 16/1114:45 -

1 stop31h 33m

Wed 2/1215:44 -

2 stops37h 36m

Deal found 6/10£859

Tue 17/1106:20 -

2 stops18h 57m

Tue 1/1213:00 -

2 stops20h 15m

Deal found 6/10£866

Thu 19/1114:45 -

1 stop15h 09m

Tue 1/1206:00 -

1 stop23h 20m

Deal found 6/10£885

Mon 16/1114:45 -

1 stop31h 33m

Thu 3/1213:54 -

1 stop15h 26m

Deal found 6/10£900

Mon 16/1114:45 -

1 stop31h 33m

Sun 29/1106:02 -

1 stop23h 18m

Deal found 6/10£924

Sun 15/1114:45 -

1 stop15h 09m

Mon 30/1115:46 -

2 stops37h 34m

Deal found 6/10£928

Wed 18/1114:45 -

2 stops29h 31m

Tue 1/1206:00 -

1 stop23h 20m

Deal found 6/10£938

Sun 15/1114:45 -

1 stop31h 33m

Sun 29/1106:02 -

1 stop23h 18m

Deal found 6/10£952

Find flight deals from Heathrow to Idaho Falls

Round-trip from	£725

Alaska Airlines
15/11-2/12
2 total stops
30h 35m total
London to Idaho Falls

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 19/11

14:45-22:54

1 stop15h 09m

Idaho Falls Fanning Field

Wed 2/12

13:54-12:20

1 stop15h 26m

£725

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

£728

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Wed 18/11

14:45-22:54

1 stop15h 09m

Idaho Falls Fanning Field

Mon 30/11

15:46-12:20

2 stops37h 34m

£900

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Mon 16/11

14:45-15:18

1 stop31h 33m

Idaho Falls Fanning Field

Mon 30/11

15:46-12:20

2 stops37h 34m

£900

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 19/11

14:45-22:54

1 stop15h 09m

Idaho Falls Fanning Field

Mon 30/11

15:46-12:20

2 stops37h 34m

£928

Flights are sorted by cheapest return flights first.

Deals found on 6/10

Sorted by cheapest first

Best time to book a flight from Heathrow to Idaho Falls

Have a flexible travel schedule? Discover the best time to fly to Idaho Falls from Heathrow with our price prediction graph.

LHR-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 Heathrow Airport to Idaho Falls

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

Denver (DEN) – chosen by Cheapflights users on 77% of one-stop itineraries from London Heathrow Airport to Idaho Falls on Cheapflights.

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

Seattle (SEA) is the most affordable one-stop option, with an average return flight price of £686.

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

Flights via Denver (DEN) offer the fastest connection on this route, with an average stopover time of 1h 11m.

Reviews of airlines servicing Idaho Falls

Read reviews from past customers who have flown with United Airlines from London Heathrow Airport to Idaho Falls. 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.

United Airlines

7.4

Good

10,324 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Asha,Sept 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.

United Airlines

7.4

Good

10,324 reviews

United Airlines

7.4

Good

10,324 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Asha,Sept 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.

Related info for your journey

What airport do you fly into for flights to Idaho Falls from London Heathrow?
Located just 3.8 mi from the city center, Idaho Falls Fanning Field is the airport most travelers will use when flying to Idaho Falls from London Heathrow. Booking flights from London Heathrow to Fanning Field (IDA) should be relatively easy as there are 0 daily inbound flights from London Heathrow from 1 airline.
How long is the flight from London Heathrow Airport to Idaho Falls?
Departing from London Heathrow Airport to Idaho Falls will take you 15h 09m. Airlines will cover a distance of 4705 mi.
Can I find deals for flights from Heathrow to Idaho Falls that include hotel bookings?
Yes. In addition to deals on Heathrow to Idaho Falls flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Idaho Falls?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Idaho Falls.
Can I find deals for business class flights from Heathrow to Idaho Falls?
Yes. Cheapflights offers flight deals from Heathrow 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

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Heathrow to Idaho Falls

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest£1,054	Average£1,166	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

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How does Cheapflights help users find flights from Heathrow to Idaho Falls?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Idaho Falls from Heathrow today with Cheapflights!

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

Cheapflights simply makes it quick and affordable to book flights from Heathrow to Idaho Falls by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Need flexible booking options for your flight to Idaho Falls from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Of course! You can now track prices for flights from Heathrow to Idaho Falls 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.

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Cheap flights from London Heathrow Airport to Idaho Falls from £725

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Idaho Falls

Cheapest flights from Heathrow to Idaho FallsExplore the most affordable flight options available from Heathrow to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 October 2026.

Explore the most affordable flight options available from Heathrow to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 October 2026.

Best flights from Heathrow to Idaho FallsDiscover carefully curated flight deals from Heathrow to Idaho Falls that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 9 October 2026.

Discover carefully curated flight deals from Heathrow to Idaho Falls that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 9 October 2026.

Last-minute flights from Heathrow to Idaho FallsDiscover last-minute flight deals from Heathrow to Idaho Falls. Data last updated 9 October 2026 and is based on user searches.

Discover last-minute flight deals from Heathrow to Idaho Falls. Data last updated 9 October 2026 and is based on user searches.

Find flight deals from Heathrow to Idaho Falls

Round-trip from

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Idaho Falls that are best for you.

Best time to book a flight from Heathrow to Idaho Falls

Have a flexible travel schedule? Discover the best time to fly to Idaho Falls from Heathrow with our price prediction graph.

Cheapflights Insights

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

Denver (DEN) – chosen by Cheapflights users on 77% of one-stop itineraries from London Heathrow Airport to Idaho Falls on Cheapflights.

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

Seattle (SEA) is the most affordable one-stop option, with an average return flight price of £686.

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

Flights via Denver (DEN) offer the fastest connection on this route, with an average stopover time of 1h 11m.

Reviews of airlines servicing Idaho Falls

Read reviews from past customers who have flown with United Airlines from London Heathrow Airport to Idaho Falls. 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.

Related info for your journey

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

How long is the flight from London Heathrow Airport to Idaho Falls?

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

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

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

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 Heathrow to Idaho Falls

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Idaho Falls by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to United States

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Search flights from Heathrow to Idaho Falls by cabin class

Find flights from Heathrow to Idaho Falls, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Heathrow and Idaho Falls flights

Browse other Heathrow and Idaho Falls flight options. Last updated on 9 October 2026.

Other flights from Heathrow

Browse through other flights departing from Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 9 October 2026.

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Top airline flying from Heathrow to Idaho Falls

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How does Cheapflights help users find flights from Heathrow to Idaho Falls?

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

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

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

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Cheapest flights from Heathrow to Idaho Falls
Explore the most affordable flight options available from Heathrow to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 October 2026.

Best flights from Heathrow to Idaho Falls
Discover carefully curated flight deals from Heathrow to Idaho Falls that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 9 October 2026.

Last-minute flights from Heathrow to Idaho Falls
Discover last-minute flight deals from Heathrow to Idaho Falls. Data last updated 9 October 2026 and is based on user searches.