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$409+ 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 3/18. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — LHR
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
1 adult, Economy
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Cheap 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 February 3, 2026.

This United Airlines deal was found by Cheapflights users on 2/2. 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.
Tue 4/710:40 am
IDA
-
LHR
1 stop16h 00m
United Airlines
Tue 4/147:25 am
LHR
-
IDA
2 stops33h 28m
United Airlines
Deal found 2/2$651
This United Airlines deal was found by Cheapflights users on 2/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/72:31 pm
IDA
-
LHR
1 stop12h 09m
United Airlines
Sun 5/178:30 am
LHR
-
IDA
2 stops38h 13m
United Airlines
Deal found 2/3$763
This American Airlines deal was found by Cheapflights users on 2/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/77:48 am
IDA
-
LHR
1 stop24h 17m
American Airlines
Sun 5/174:10 pm
LHR
-
IDA
1 stop14h 29m
American Airlines
Deal found 2/3$779
This Gurufare deal was found by Cheapflights users on 2/3. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/73:16 pm
IDA
-
LHR
2 stops17h 19m
Scandinavian Airlines
Sun 5/176:15 pm
LHR
-
IDA
2 stops23h 32m
Scandinavian Airlines
Deal found 2/3$783
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Wed 5/136:30 am
IDA
-
LHR
1 stop22h 50m
United Airlines
Wed 5/276:55 am
LHR
-
IDA
2 stops34h 00m
United Airlines
Deal found 2/2$784
This United Airlines deal was found by Cheapflights users on 2/1. 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.
Wed 5/136:30 am
IDA
-
LHR
1 stop22h 50m
United Airlines
Mon 5/253:30 pm
LHR
-
IDA
2 stops32h 52m
United Airlines
Deal found 2/1$836
This United Airlines deal was found by Cheapflights users on 2/2. 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 2/276:35 am
IDA
-
LHR
1 stop20h 05m
United Airlines
Tue 3/311:10 am
LHR
-
IDA
2 stops29h 38m
United Airlines
Deal found 2/2$841

Find 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 February 3, 2026.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$651
(United Airlines)

One-way from

$409
(United Airlines)

Popular in

June

Cheapest in

March
Provider with most accurate pricing for Idaho Falls Fanning Field-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Idaho Falls Fanning Field-London (LON) flights.
Search Deals
From Idaho Falls Fanning Field to United Kingdom
Search Deals
One-way flight from Idaho Falls Fanning Field to United Kingdom
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($168 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
Search Deals

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 February 3, 2026.
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

Tue 5/5

2:31 pm-9:40 am

1 stop12h 09m

London Heathrow

Fri 5/15

6:55 am-9:55 am

2 stops34h 00m

$651

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Tue 4/7

10:40 am-12:20 pm

1 stop18h 40m

London Heathrow

Tue 4/14

7:25 am-9:53 am

2 stops33h 28m

$651

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Tue 4/7

7:48 am-3:05 pm

1 stop24h 17m

London Heathrow

Tue 4/14

4:10 pm-11:39 pm

1 stop14h 29m

$680

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Thu 5/7

7:48 am-3:05 pm

1 stop24h 17m

London Heathrow

Sun 5/17

4:10 pm-11:39 pm

1 stop14h 29m

$779

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 5/13

2:31 pm-9:40 am

1 stop12h 09m

London Heathrow

Wed 5/27

7:25 am-9:55 am

2 stops33h 30m

$783

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 3/18

5:30 pm-10:55 pm

2 stops23h 25m

$409

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 3/18

2:18 pm-12:15 pm

1 stop15h 57m

$503

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 3/18

5:59 pm-5:30 pm

3 stops41h 31m

$583

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

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
No data available for this route at this time. Please check back soon.

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 February 3, 2026.
Get a feel of what it's like to fly with 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.
United Airlines
7.4
Good
9,236 reviews

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,236 reviews
United Airlines
7.4
Good
9,236 reviews

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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 12h 09m. Fly via United Airlines to get the fastest option. There are 4705 mi between Idaho Falls and United Kingdom.

  • 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.

See more FAQs

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Alternative routes for Idaho Falls to United Kingdom

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Idaho Falls to United Kingdom

Discover the top airline 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 February 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$699Average$846FlexibilityNo cancel feeOn-time69%

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