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$482+ Cheap flights from Idaho Falls (IDA) to Heathrow (LHR)

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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — LHR
feb. 26 — mar. 51
jue. 2/26
jue. 3/5
1 adult, Economy
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Cheap 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 enero 27, 2026.

This United Airlines deal was found by Cheapflights users on 1/26. 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.
mar. 4/76:45 am
IDA
-
LHR
1 stop22h 35m
United Airlines
mar. 4/147:25 am
LHR
-
IDA
2 stops33h 28m
United Airlines
Deal found 1/26$646
This Delta deal was found by Cheapflights users on 1/25. 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.
mié. 4/81:10 pm
IDA
-
LHR
2 stops19h 25m
Delta
jue. 4/166:15 am
LHR
-
IDA
2 stops23h 25m
Delta
Deal found 1/25$657
This United Airlines deal was found by Cheapflights users on 1/26. 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.
lun. 3/162:35 pm
IDA
-
LHR
1 stop13h 05m
United Airlines
lun. 3/234:20 pm
LHR
-
IDA
2 stops23h 36m
United Airlines
Deal found 1/26$663
This Delta deal was found by Cheapflights users on 1/25. 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.
mié. 4/81:10 pm
IDA
-
LHR
1 stop13h 50m
Delta
lun. 4/203:20 pm
LHR
-
IDA
2 stops33h 57m
Delta
Deal found 1/25$666
This Delta deal was found by Cheapflights users on 1/25. 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.
sáb. 4/115:45 am
IDA
-
LHR
2 stops44h 30m
Delta
lun. 4/2011:30 am
LHR
-
IDA
2 stops37h 47m
Delta
Deal found 1/25$676
This United Airlines deal was found by Cheapflights users on 1/25. 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.
mié. 4/85:20 pm
IDA
-
LHR
1 stop12h 00m
United Airlines
vie. 4/179:30 am
LHR
-
IDA
2 stops31h 23m
United Airlines
Deal found 1/25$678
This Delta deal was found by Cheapflights users on 1/25. 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.
mié. 4/81:10 pm
IDA
-
LHR
2 stops19h 25m
Delta
vie. 4/173:50 pm
LHR
-
IDA
2 stops27h 36m
Delta
Deal found 1/25$679
This United Airlines deal was found by Cheapflights users on 1/25. 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.
jue. 4/96:45 am
IDA
-
LHR
1 stop19h 55m
United Airlines
jue. 4/169:00 am
LHR
-
IDA
2 stops31h 53m
United Airlines
Deal found 1/25$696
This United Airlines deal was found by Cheapflights users on 1/25. 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.
mié. 4/85:20 pm
IDA
-
LHR
1 stop12h 00m
United Airlines
dom. 4/199:00 am
LHR
-
IDA
2 stops31h 53m
United Airlines
Deal found 1/25$702

Find flight deals from Idaho Falls to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Idaho Falls (IDA) to Heathrow (LHR). 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 enero 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$646
(United Airlines)

One-way from

$482
(Expedia)

Popular in

June

Cheapest in

March

Average price

$823
Provider with most accurate pricing for Idaho Falls Fanning Field-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for Idaho Falls Fanning Field-London Heathrow flights.
Search Deals
From Idaho Falls Fanning Field to London Heathrow
Search Deals
One-way flight from Idaho Falls Fanning Field to London Heathrow
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($164 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
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho Falls to Heathrow 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 enero 27, 2026.
Use the filters below to find and compare flights from Idaho Falls to London Heathrow Airport that are best for you.

Fly from

Idaho Falls

Fly to

Heathrow

Route

Depart

Return

Price

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

mié. 4/8

5:20 pm-12:20 pm

1 stop12h 00m

London Heathrow

jue. 4/16

9:00 am-9:53 am

2 stops31h 53m

$646

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

mar. 5/5

2:31 pm-12:20 pm

1 stop14h 49m

London Heathrow

vie. 5/15

6:55 am-9:55 am

2 stops34h 00m

$646

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

mar. 4/7

6:45 am-12:20 pm

1 stop22h 35m

London Heathrow

mar. 4/14

7:25 am-9:53 am

2 stops33h 28m

$646

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

lun. 3/16

2:35 pm-9:40 am

1 stop13h 05m

London Heathrow

lun. 3/23

4:20 pm-9:56 am

2 stops23h 36m

$663

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

dom. 4/12

6:55 pm-7:10 am

2 stops29h 15m

London Heathrow

lun. 4/20

11:30 am-6:17 pm

2 stops37h 47m

$670

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

mié. 4/8

1:10 pm-10:00 am

1 stop13h 50m

London Heathrow

jue. 4/16

10:55 am-10:40 pm

1 stop18h 45m

$675

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

sáb. 4/11

5:45 am-9:15 am

2 stops44h 30m

London Heathrow

lun. 4/20

11:30 am-6:17 pm

2 stops37h 47m

$676

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

mié. 4/8

5:20 pm-12:20 pm

1 stop12h 00m

London Heathrow

vie. 4/17

9:30 am-9:53 am

2 stops31h 23m

$678

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

mar. 5/19

6:00 am-4:00 pm

2 stops27h 00m

$482

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Compare providers for flights from Idaho Falls to Heathrow

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Idaho Falls to Heathrow in January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Idaho Falls-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Idaho Falls-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Idaho Falls-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Idaho Falls-London Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Idaho Falls-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated enero 27, 2026.
Get a feel of what it's like to fly with United 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
9,205 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

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
9,205 reviews
United Airlines
7.4
Good
9,205 reviews

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

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 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?

    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.

  • How long is the flight from Idaho Falls to London Heathrow Airport?

    United Airlines can get you from Idaho Falls to London Heathrow Airport in just under 12h. Your travel time can differ by up to . Idaho Falls and London Heathrow Airport are separated by a distance of 4705 mi.

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

    United Airlines, at $699, was found to be the cheapest airline from Idaho Falls to London Heathrow Airport..

  • 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.

See more FAQs

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ilford
Hounslow
Southend-on-Sea
Harrow
Croydon
Eastleigh
Gatwick
Dartford
Dover
Winchester
Orpington
Watford
Northampton
Hayes
Borehamwood
Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Idaho Falls to Heathrow

Discover the top airline that operate flights from Idaho Falls to Heathrow. 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 enero 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$699Average$927FlexibilityNo cancel feeOn-time69%

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