What are the cheapest airlines flying from Idaho Falls to London Heathrow Airport round-trip?

American Airlines, at $721, was found to be the cheapest airline from Idaho Falls to London Heathrow Airport. An alternate airline flying to your destination would be United Airlines. American Airlines is priced at 28% lower than the current average price of a flight leaving 3 months from now.

What is the cheapest day to fly from Idaho Falls to London Heathrow Airport?

Travelers seeking maximum savings on their Idaho Falls to London Heathrow Airport flight should consider departing on Thursday afternoons when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

If weather is an important factor for your trip to London Heathrow Airport, 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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

What is the cheapest day to fly round-trip from Idaho Falls to London Heathrow Airport?

Wednesday is generally a great day to depart. Flying on this day could help you save up to 95%.

What is the cheapest month to fly from Idaho Falls to London Heathrow Airport?

November is one of the best times of the year to fly to London Heathrow Airport from Idaho Falls. Prices for November average $1,061 per person but you can even find prices for as low as $666. The most expensive prices can be found in the month of December. Opting for a November flight can save you 84% on your journey compared to booking in December

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

Idaho Falls Fanning Field (IDA), located 3.8 mi from the city center, is the airport you fly out of when you book flights from Idaho Falls to London Heathrow. 1 airline have flights from Fanning Field to London Heathrow on a regular basis. Booking flights from Idaho Falls Fanning Field to London Heathrow should not be difficult; the airport handles an average of 0 outbound flights to London Heathrow per day.

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

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

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

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

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

Yes. Cheapflights offers flight deals from Idaho Falls to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$721+ Flights from Idaho Falls to London Heathrow Airport

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Cheap flight deals from Idaho Falls to Heathrow

Round-trip from	$721 (American Airlines)
Popular in	December
Cheapest in	March
Average price	$1,541

From Idaho Falls Fanning Field to London Heathrow

Search Deals

Highest demand for flights based on searches. 38% potential increase in price ($635 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 7% potential price decrease ($71 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in June 2025

Search Deals

Find flight deals from Idaho Falls to Heathrow

Cheapest flights from Idaho Falls to Heathrow
Explore the most affordable flight options available from Idaho Falls to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 30, 2025.

lun. 9/112:46 pmIDA - LHR

1 stop13h 24mAmerican Airlines

jue. 9/118:50 amLHR - IDA

2 stops19h 33mAmerican Airlines

Deal found 6/27

$721

lun. 9/15:56 pmIDA - LHR

2 stops29h 34mUnited Airlines

jue. 9/113:50 pmLHR - IDA

2 stops28h 40mUnited Airlines

Deal found 6/27

$741

vie. 8/16:15 amIDA - LHR

1 stop17h 35mMultiple Airlines

sáb. 8/169:50 amLHR - IDA

1 stop19h 49mMultiple Airlines

Deal found 6/30

$943

Best flights from Idaho Falls to Heathrow
Discover carefully curated flight deals from Idaho Falls to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated junio 30, 2025.

lun. 9/112:46 pmIDA - LHR

1 stop13h 24mAmerican Airlines

jue. 9/118:50 amLHR - IDA

2 stops19h 33mAmerican Airlines

Deal found 6/27

$721

lun. 9/15:56 pmIDA - LHR

2 stops29h 34mUnited Airlines

jue. 9/113:50 pmLHR - IDA

2 stops28h 40mUnited Airlines

Deal found 6/27

$741

vie. 8/16:15 amIDA - LHR

1 stop17h 35mMultiple Airlines

sáb. 8/169:50 amLHR - IDA

1 stop19h 49mMultiple Airlines

Deal found 6/30

$943

Last-minute flights from Idaho Falls to Heathrow
Discover last-minute flight deals from Idaho Falls to Heathrow. Data last updated junio 30, 2025 and is based on user searches.

jue. 7/3110:45 amIDA - LHR

1 stop15h 55mUnited Airlines

vie. 8/84:00 pmLHR - IDA

2 stops24h 44mUnited Airlines

Deal found 6/30

$888

jue. 7/316:51 amIDA - LHR

1 stop20h 59mAmerican Airlines

vie. 8/812:00 pmLHR - IDA

1 stop16h 18mAmerican Airlines

Deal found 6/28

$933

jue. 7/316:51 amIDA - LHR

1 stop19h 09mMultiple Airlines

vie. 8/89:50 amLHR - IDA

1 stop19h 49mMultiple Airlines

Deal found 6/30

$971

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

lun. 9/1

12:46 pm-9:10 am

1 stop13h 24m

London Heathrow

jue. 9/11

8:50 am-9:23 pm

2 stops19h 33m

$721

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

lun. 9/1

5:56 pm-6:30 am

2 stops29h 34m

London Heathrow

jue. 9/11

3:50 pm-1:30 pm

2 stops28h 40m

$741

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

vie. 8/1

6:15 am-6:50 am

1 stop17h 35m

London Heathrow

sáb. 8/16

9:50 am-10:39 pm

1 stop19h 49m

$943

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/27

Best time to book a flight from Idaho Falls to Heathrow

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

Estimated round-trip 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 Idaho Falls to London Heathrow Airport

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

Currently, November is the cheapest month in which you can book a flight from Idaho Falls to London Heathrow Airport (average of $661). Flying from Idaho Falls to London Heathrow Airport in June is currently the most expensive (average of $1,098). 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 is the cheapest time of day to fly from IDA to LHR?

Unlike in the morning, when flights are generally more expensive, you can save up to 34% on flights from Idaho Falls to London Heathrow Airport by exploring options for tickets at noon.

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with United Airlines and American Airlines from Idaho Falls to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,852 reviews

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

United Airlines

7.4

Good

8,852 reviews

United Airlines

7.4

Good

8,852 reviews

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

American Airlines

7.2

Good

10,000 reviews

United Airlines

7.4

Good

8,852 reviews

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

What airport do you fly from for flights from Idaho Falls to London Heathrow?
Idaho Falls Fanning Field (IDA), located 3.8 mi from the city center, is the airport you fly out of when you book flights from Idaho Falls to London Heathrow. 1 airline have flights from Fanning Field to London Heathrow on a regular basis. Booking flights from Idaho Falls Fanning Field to London Heathrow should not be difficult; the airport handles an average of 0 outbound flights to London Heathrow per day.
What are the cheapest airlines flying from Idaho Falls to London Heathrow Airport round-trip?
American Airlines, at $721, was found to be the cheapest airline from Idaho Falls to London Heathrow Airport. An alternate airline flying to your destination would be United Airlines. American Airlines is priced at 28% lower than the current average price of a flight leaving 3 months from now.
Can I find deals for flights from Idaho Falls to Heathrow that include hotel bookings?
Yes. In addition to deals on Idaho Falls to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Idaho Falls to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho Falls to Heathrow.
Can I find deals for business class flights from Idaho Falls to Heathrow?
Yes. Cheapflights offers flight deals from Idaho Falls to Heathrow 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 Idaho Falls to London Heathrow Airport?
Currently, November is the cheapest month in which you can book a flight from Idaho Falls to London Heathrow Airport (average of $661). Flying from Idaho Falls to London Heathrow Airport in June is currently the most expensive (average of $1,098). 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.

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Top airline flying from Idaho Falls to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$699	Average$1,013	FlexibilityNo cancel fee	On-time69%

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$721+ Cheap flights from Idaho Falls (IDA) to Heathrow (LHR)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/1. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Idaho Falls to Heathrow with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Idaho Falls to Heathrow

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from Idaho Falls to Heathrow

Cheapest flights from Idaho Falls to HeathrowExplore the most affordable flight options available from Idaho Falls to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 30, 2025.

Explore the most affordable flight options available from Idaho Falls to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 30, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Idaho Falls to Heathrow

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

Cheapflights Insights

Everything you need to know about your flight from Idaho Falls to London Heathrow Airport

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

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

Find hourly flight availability from Idaho Falls to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated junio 30, 2025.

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with United Airlines and American Airlines from Idaho Falls to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Idaho Falls to Heathrow. 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 from for flights from Idaho Falls to London Heathrow?

What are the cheapest airlines flying from Idaho Falls to London Heathrow Airport round-trip?

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

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

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

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

Traveling to a place near 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 Idaho Falls to Heathrow

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Top airline flying from Idaho Falls to Heathrow

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Book with Flexibility

Travel Smart

Cheapest flights from Idaho Falls to Heathrow
Explore the most affordable flight options available from Idaho Falls to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 30, 2025.