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

Cheapflights users have booked flights from Idaho Falls to London round-trip from $837. Other airlines that can offer you cheap pricing are American Airlines, from $858, and Delta, from $938. You may be able to fly from Idaho Falls to London for 21% less than the average price by searching for these airlines.

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

Travelers seeking maximum savings on their Idaho Falls to London 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 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 when rainfall is around 1.6 in.

If weather is an important factor for your trip to London, 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?

Users have found that flying from Idaho Falls to London on a Sunday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

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

The best pricing can be found in the month of November. Prices to London from Idaho Falls average $1,061. You can even find prices in November for less than $1,061, as users have found deals to London from as low as $666. The month of December appears to be one of the more expensive times to travel to London from Idaho Falls. Flying in the targeted month can save you up to 84%.

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

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

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

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

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

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

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

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

$837+ Flights from Idaho Falls to London

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Cheap flight deals from Idaho Falls to London

Round-trip from	$837 (United Airlines)
Popular in	December
Cheapest in	November
Average price	$1,206

From Idaho Falls Fanning Field to London (LON)

Search Deals

Highest demand for flights based on searches. 6% potential increase in price ($77 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 9% potential price decrease ($90 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in July 2025

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Find flight deals from Idaho Falls to London

Cheapest flights from Idaho Falls to London
Explore the most affordable flight options available from Idaho Falls to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 3, 2025.

vie. 9/197:00 amIDA - LHR

2 stops19h 35mUnited Airlines

lun. 9/295:40 pmLHR - IDA

2 stops30h 38mUnited Airlines

Deal found 7/1

$837

vie. 9/1912:54 pmIDA - LHR

1 stop14h 36mAmerican Airlines

sáb. 9/278:55 amLHR - IDA

2 stops19h 30mAmerican Airlines

Deal found 7/1

$858

jue. 7/313:04 pmIDA - LHR

2 stops15h 06mDelta

vie. 8/812:25 pmLHR - IDA

2 stops29h 09mDelta

Deal found 7/3

$938

jue. 7/316:51 amIDA - LHR

1 stop20h 59mMultiple Airlines

vie. 8/89:50 amLHR - IDA

1 stop19h 49mMultiple Airlines

Deal found 7/1

$971

Best flights from Idaho Falls to London
Discover carefully curated flight deals from Idaho Falls to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated julio 3, 2025.

vie. 9/197:00 amIDA - LHR

2 stops19h 35mUnited Airlines

lun. 9/295:40 pmLHR - IDA

2 stops30h 38mUnited Airlines

Deal found 7/1

$837

vie. 9/1912:54 pmIDA - LHR

1 stop14h 36mAmerican Airlines

sáb. 9/278:55 amLHR - IDA

2 stops19h 30mAmerican Airlines

Deal found 7/1

$858

jue. 7/313:04 pmIDA - LHR

2 stops15h 06mDelta

vie. 8/812:25 pmLHR - IDA

2 stops29h 09mDelta

Deal found 7/3

$938

jue. 7/316:51 amIDA - LHR

1 stop20h 59mMultiple Airlines

vie. 8/89:50 amLHR - IDA

1 stop19h 49mMultiple Airlines

Deal found 7/1

$971

Last-minute flights from Idaho Falls to London
Discover last-minute flight deals from Idaho Falls to London. Data last updated julio 3, 2025 and is based on user searches.

jue. 7/313:04 pmIDA - LHR

2 stops15h 06mDelta

vie. 8/812:25 pmLHR - IDA

2 stops29h 09mDelta

Deal found 7/3

$938

jue. 7/316:51 amIDA - LHR

1 stop20h 59mMultiple Airlines

vie. 8/89:50 amLHR - IDA

1 stop19h 49mMultiple Airlines

Deal found 7/1

$971

jue. 7/316:51 amIDA - LHR

1 stop20h 59mAmerican Airlines

vie. 8/88:20 amLHR - IDA

1 stop19h 58mAmerican Airlines

Deal found 7/2

$1,083

sáb. 8/162:38 pmIDA - LHR

1 stop14h 42mUnited Airlines

sáb. 8/237:30 amLHR - IDA

2 stops33h 17mUnited Airlines

Deal found 7/2

$847

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

vie. 9/19

7:00 am-9:35 am

2 stops19h 35m

London Heathrow

lun. 9/29

5:40 pm-5:18 pm

2 stops30h 38m

$837

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

vie. 9/19

12:54 pm-10:30 am

1 stop14h 36m

London Heathrow

sáb. 9/27

8:55 am-9:25 pm

2 stops19h 30m

$858

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

jue. 7/31

3:04 pm-1:10 pm

2 stops15h 06m

London Heathrow

vie. 8/8

12:25 pm-10:34 am

2 stops29h 09m

$938

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

jue. 7/31

6:51 am-10:50 am

1 stop20h 59m

London Heathrow

vie. 8/8

9:50 am-10:39 pm

1 stop19h 49m

$971

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Best time to book a flight from Idaho Falls to London

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

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

Currently, November is the cheapest month in which you can book a flight from Idaho Falls to London (average of $661). Flying from Idaho Falls to London 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 LON?

It’s typically best to fly out from Idaho Falls to London in the afternoon. Doing so could potentially save you 36% on the flight price compared to flying in the morning, which is usually more expensive.

How much does it cost to fly round-trip from Idaho Falls to London?

Reviews of airlines servicing London

Read reviews from past customers who have flown Delta, United Airlines, and American Airlines from Idaho Falls to London. 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.

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,982 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,861 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What airport do you fly from for flights from Idaho Falls to London?
Located just 3.8 mi from the city center, Idaho Falls Fanning Field is the airport most travelers will use when flying to London from Idaho Falls. Booking flights from Fanning Field (IDA) to London should be relatively easy as there are 0 daily outbound flights to London from 1 airline.
What are the cheapest airlines flying from Idaho Falls to London round-trip?
Cheapflights users have booked flights from Idaho Falls to London round-trip from $837. Other airlines that can offer you cheap pricing are American Airlines, from $858, and Delta, from $938. You may be able to fly from Idaho Falls to London for 21% less than the average price by searching for these airlines.
Can I find deals for flights from Idaho Falls to London that include hotel bookings?
Yes. In addition to deals on Idaho Falls to London flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Idaho Falls to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho Falls to London.
Can I find deals for business class flights from Idaho Falls to London?
Yes. Cheapflights offers flight deals from Idaho Falls to London 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?
Currently, November is the cheapest month in which you can book a flight from Idaho Falls to London (average of $661). Flying from Idaho Falls to London 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.

See more FAQs

Hounslow

Hayes

Thornton Heath

Canterbury

Harrow

Dover

Gatwick

Orpington

Watford

Croydon

Folkestone

Borehamwood

Aylesbury

Chelmsford

Brentwood

Chichester

Arundel

Milton Keynes

Bishop's Stortford

Dartford

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Top airline flying from Idaho Falls to London

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

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$837+ Cheap flights from Idaho Falls (IDA) to London (LON)

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 9/19. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Idaho Falls to London 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 London

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from Idaho Falls to London

Cheapest flights from Idaho Falls to LondonExplore the most affordable flight options available from Idaho Falls to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 3, 2025.

Explore the most affordable flight options available from Idaho Falls to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 3, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Idaho Falls to London

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

Cheapflights Insights

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

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

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

Find hourly flight availability from Idaho Falls to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 3, 2025.

How much does it cost to fly round-trip from Idaho Falls to London?

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated julio 3, 2025.

Read reviews from past customers who have flown Delta, United Airlines, and American Airlines from Idaho Falls to London. 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

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

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

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

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

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

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

Traveling to a place near Idaho Falls?

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Alternative routes for Idaho Falls to London

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Top airline flying from Idaho Falls to London

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Cheapest flights from Idaho Falls to London
Explore the most affordable flight options available from Idaho Falls to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 3, 2025.