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$335+ Cheap flights from Idaho Falls (IDA) to the United Kingdom

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — LHR
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Idaho Falls to United Kingdom

Keep the following information in mind while searching for Idaho Falls to United Kingdom flight deals. Data was last updated September 17, 2025.

Round-trip from

$685
(Delta)

One-way from

$335
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$1,049
From Idaho Falls Fanning Field to United Kingdom
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One-way flight from Idaho Falls Fanning Field to United Kingdom
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Highest demand for flights based on searches. 21% potential increase in price ($288 potential increase over avg. RT price).
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Cheapest flight prices on average. 9% potential price decrease ($97 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Idaho Falls to United Kingdom

Cheapest flights from Idaho Falls to United Kingdom
Explore the most affordable flight options available from Idaho Falls to United Kingdom. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Delta deal was found by Cheapflights users on 9/15. 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.
Mon 10/131:15 pmIDA - LHR
1 stop13h 35mDelta
Mon 10/208:10 pmLHR - IDA
2 stops23h 23mDelta
Deal found 9/15$685
This Delta deal was found by Cheapflights users on 9/15. 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.
Mon 9/226:51 pmIDA - LHR
2 stops18h 09mDelta
Mon 9/298:25 pmLHR - IDA
2 stops23h 01mDelta
Deal found 9/15$725
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Mon 9/225:56 pmIDA - LHR
1 stop11h 24mUnited Airlines
Mon 9/295:40 pmLHR - IDA
2 stops30h 38mUnited Airlines
Deal found 9/15$727
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Fri 10/315:00 amIDA - LHR
2 stops20h 30mUnited Airlines
Fri 11/711:35 amLHR - IDA
1 stop18h 17mUnited Airlines
Deal found 9/16$748
This American Airlines deal was found by Cheapflights users on 9/16. 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.
Fri 10/313:50 pmIDA - LHR
1 stop14h 30mMultiple Airlines
Fri 11/72:25 pmLHR - IDA
1 stop15h 09mMultiple Airlines
Deal found 9/16$762
This oojo deal was found by Cheapflights users on 9/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/203:50 pmIDA - LHR
1 stop13h 30mMultiple Airlines
Thu 11/272:55 pmLHR - IDA
1 stop30h 42mMultiple Airlines
Deal found 9/15$3,813

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho Falls to United Kingdom 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 September 17, 2025.
Use the filters below to find and compare flights from Idaho Falls to the United Kingdom that are best for you.

Fly from

Idaho Falls

Fly to

United Kingdom

Route

Depart

Return

Price

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 10/13

1:15 pm-9:50 am

1 stop13h 35m

London Heathrow

Mon 10/20

8:10 pm-12:33 pm

2 stops23h 23m

$685

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Thu 10/30

5:00 am-9:40 am

1 stop22h 40m

London Heathrow

Thu 11/6

6:00 pm-10:52 pm

2 stops35h 52m

$727

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Fri 10/31

5:00 am-7:30 am

2 stops20h 30m

London Heathrow

Fri 11/7

1:00 pm-5:46 pm

2 stops35h 46m

$731

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 10/13

2:35 pm-9:40 am

1 stop12h 05m

London Heathrow

Mon 10/20

11:25 am-8:52 pm

1 stop16h 27m

$743

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Fri 10/31

3:50 pm-12:20 pm

1 stop14h 30m

London Heathrow

Fri 11/7

2:25 pm-10:34 pm

1 stop15h 09m

$762

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Thu 11/20

3:50 pm-12:20 pm

1 stop13h 30m

London Heathrow

Thu 11/27

2:55 pm-2:37 pm

1 stop30h 42m

$3,813

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 10/27

3:50 pm-5:30 pm

3 stops43h 40m

$335

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Tue 11/25

7:10 am-1:15 pm

1 stop23h 05m

$449

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 10/27

1:11 pm-11:35 am

1 stop16h 24m

$449

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Tue 11/25

5:00 am-5:55 am

2 stops17h 55m

$459

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 13 results
1
2

Best time to book a flight from Idaho Falls to United Kingdom

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

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

Currently, November is the cheapest month in which you can book a flight from Idaho Falls to United Kingdom (average of $661). Flying from Idaho Falls to United Kingdom in June is currently the most expensive (average of $1,097). 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 GB?

Find hourly flight availability from Idaho Falls to United Kingdom. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

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

Reviews of airlines servicing United Kingdom

Get insights into the airlines that provide service to United Kingdom. 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 United Kingdom. Reviews last updated September 17, 2025.
Get a feel of what it's like to fly with Delta and United Airlines from Idaho Falls to the United Kingdom by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,961 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

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
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

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
8,926 reviews
Delta
8.0
Very good
7,961 reviews

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

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 United Kingdom. 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 United Kingdom?

    Located just 3.8 mi from the city center, Idaho Falls Fanning Field (IDA) is the airport most travelers will use when flying to United Kingdom from Idaho Falls.

  • How long is the flight from Idaho Falls to United Kingdom?

    There are many flights that can get you from Idaho Falls to United Kingdom in 13h 35m. Fly via Delta or United Airlines to get the fastest option. There are 4705 mi between Idaho Falls and United Kingdom. Both multi-stop and nonstop flights can be found to your destination and back.

  • Can I find deals for flights from Idaho Falls to United Kingdom that include hotel bookings?

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

  • How can I find direct flights from Idaho Falls to United Kingdom?

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

  • Can I find deals for business class flights from Idaho Falls to United Kingdom?

    Yes. Cheapflights offers flight deals from Idaho Falls to United Kingdom 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 United Kingdom?

    Currently, November is the cheapest month in which you can book a flight from Idaho Falls to United Kingdom (average of $661). Flying from Idaho Falls to United Kingdom in June is currently the most expensive (average of $1,097). 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

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Top 2 airlines flying from Idaho Falls to United Kingdom

Discover the top 2 airlines that operate flights from Idaho Falls to United Kingdom. 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$691Average$1,200FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$699Average$1,037FlexibilityNo cancel feeOn-time69%

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