London

$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.
IDA — LON
jul. 8 — jul. 151
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Cheap flight deals from Idaho Falls to London

Discover tips and strategies to find the most affordable flight options for your journey from Idaho Falls (IDA) to London (LON). 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 julio 3, 2025.

Round-trip from

$837
(United Airlines)

Popular in

December

Cheapest in

November

Average price

$1,206
From Idaho Falls Fanning Field to London (LON)
Highest demand for flights based on searches. 6% potential increase in price ($77 potential increase over avg. RT price).
Cheapest flight prices on average. 9% potential price decrease ($90 potential savings vs. average RT price).
Average for round-trip flights in July 2025

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.

This United Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
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
This American Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
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
This Delta deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/313:04 pmIDA - LHR
2 stops15h 06mDelta
vie. 8/812:25 pmLHR - IDA
2 stops29h 09mDelta
Deal found 7/3$938
This American Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
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

Cheapflights Fare Finder

Customize your flight search to find flights from Idaho Falls to London 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 2,558,603 searches. Data last updated julio 3, 2025.
Use the filters below to find and compare flights from Idaho Falls to London that are best for you.

Fly from

Idaho Falls

Fly to

London

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?

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.

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

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.
8.0
Very good

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

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!
8.0
Very good
8.0
Very good

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

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!
8.0
Very good

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

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!
8.0
Very good

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

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

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?

    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

Traveling to a place near Idaho Falls?

Book flights to Idaho Falls if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Canterbury
Harrow
Dover
Gatwick
Orpington
Watford
Croydon
Folkestone
Borehamwood
Aylesbury
Chelmsford
Brentwood
Chichester
Arundel
Milton Keynes
Bishop's Stortford
Dartford

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Idaho Falls to London

Discover the top airline that operate flights from Idaho Falls to London. 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 2,558,603 searches. Data last updated julio 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$699Average$1,013FlexibilityNo cancel feeOn-time69%

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