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Heathrow

$636+ Cheap flights from Idaho Falls (IDA) to Heathrow (LHR)

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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — LHR
ago. 19 — ago. 261
mar. 8/19
mar. 8/26
1 adult, Economy
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Cheap 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 agosto 14, 2025.

Round-trip from

$636
(United Airlines)

Popular in

December

Cheapest in

March

Average price

$861
From Idaho Falls Fanning Field to London Heathrow
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Highest demand for flights based on searches. 37% potential increase in price ($581 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($65 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find 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 agosto 14, 2025.

This United Airlines deal was found by Cheapflights users on 8/13. 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. 9/27:00 amIDA - LHR
1 stop19h 40mUnited Airlines
mié. 9/106:55 amLHR - IDA
2 stops33h 52mUnited Airlines
Deal found 8/13$636
This United Airlines deal was found by Cheapflights users on 8/13. 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. 10/27:00 amIDA - LHR
2 stops21h 50mUnited Airlines
vie. 10/106:55 amLHR - IDA
2 stops33h 53mUnited Airlines
Deal found 8/13$692
This Trip.com deal was found by Cheapflights users on 8/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/86:00 amIDA - LHR
2 stops22h 55mMultiple Airlines
dom. 10/121:05 pmLHR - IDA
2 stops16h 33mMultiple Airlines
Deal found 8/13$696
This Trip.com deal was found by Cheapflights users on 8/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/96:00 amIDA - LHR
2 stops46h 55mMultiple Airlines
dom. 10/121:05 pmLHR - IDA
2 stops16h 33mMultiple Airlines
Deal found 8/13$750
This American Airlines deal was found by Cheapflights users on 8/13. 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. 10/23:57 pmIDA - LHR
1 stop14h 43mMultiple Airlines
vie. 10/108:20 amLHR - IDA
1 stop20h 29mMultiple Airlines
Deal found 8/13$799
This United Airlines deal was found by Cheapflights users on 8/13. 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. 10/95:00 amIDA - LHR
2 stops18h 20mUnited Airlines
dom. 10/121:40 pmLHR - IDA
2 stops27h 08mUnited Airlines
Deal found 8/13$842
This United Airlines deal was found by Cheapflights users on 8/13. 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. 10/85:00 amIDA - LHR
2 stops23h 50mUnited Airlines
dom. 10/121:40 pmLHR - IDA
2 stops27h 08mUnited Airlines
Deal found 8/13$901
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/86:00 amIDA - LHR
1 stop17h 50mMultiple Airlines
sáb. 10/115:00 pmLHR - IDA
2 stops36h 38mMultiple Airlines
Deal found 8/13$1,303

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 agosto 14, 2025.
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

mar. 9/2

7:00 am-9:40 am

1 stop19h 40m

London Heathrow

mié. 9/10

6:55 am-9:47 am

2 stops33h 52m

$636

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

jue. 10/2

7:00 am-11:50 am

2 stops21h 50m

London Heathrow

vie. 10/10

6:55 am-9:48 am

2 stops33h 53m

$692

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

mié. 10/8

6:00 am-11:55 am

2 stops22h 55m

London Heathrow

dom. 10/12

1:05 pm-10:38 pm

2 stops16h 33m

$696

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

mié. 10/8

7:00 am-11:50 am

2 stops21h 50m

London Heathrow

dom. 10/12

11:25 am-5:15 pm

1 stop12h 50m

$707

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

jue. 10/9

6:00 am-11:55 am

2 stops46h 55m

London Heathrow

dom. 10/12

1:05 pm-10:38 pm

2 stops16h 33m

$750

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

mié. 10/8

12:55 pm-2:25 pm

1 stop18h 30m

London Heathrow

dom. 10/12

8:20 am-9:49 pm

1 stop20h 29m

$799

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

jue. 10/2

3:57 pm-1:40 pm

1 stop14h 43m

London Heathrow

vie. 10/10

8:20 am-9:49 pm

1 stop20h 29m

$799

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

jue. 10/9

5:00 am-6:20 am

2 stops18h 20m

London Heathrow

dom. 10/12

1:40 pm-9:48 am

2 stops27h 08m

$842

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

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.

Cheapflights Insights

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

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

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

Find hourly flight availability from Idaho Falls to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated agosto 14, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 34% on flights from Idaho Falls to London Heathrow Airport by exploring options for tickets at noon.

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 agosto 14, 2025.
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
8,916 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,916 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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.

  • 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.. United Airlines is priced at 28% lower than the current average price of a flight leaving 3 months from now.

  • 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.

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

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

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Harrow
Canterbury
Dartford
Dover
Stratford-upon-Avon
Orpington
Watford
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Chelmsford
Southend-on-Sea
Folkestone
Chichester
Swindon

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 agosto 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$699Average$973FlexibilityNo cancel feeOn-time69%

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