$1,146 Cheap Flights from London (LCY) to Idaho Falls (IDA)

View $1,146 flight on Wed, Nov 12, 2025Opens in a new window

Popular airlines from London City Airport (LCY) to Idaho Falls Regional Airport (IDA)

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Cheap Flights from London to Idaho Falls (LCY-IDA)

Prices were available within the past 7 days and start at $1,146 for one-way flights and $1,454 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Tue, Aug 5 - Tue, Aug 19
LCY
London
IDA
Idaho Falls
$1,454 Roundtrip, found 2 days ago
$1,454
Roundtrip
found 2 days ago
Select Aer Lingus flight, departing Tue, Aug 5 from London to Idaho Falls, returning Tue, Aug 19, priced at $1,454 found 2 days ago
Aer Lingus
Tue, Aug 5 - Tue, Aug 19
LCY
London
IDA
Idaho Falls
$1,459 Roundtrip, found 2 days ago
$1,459
Roundtrip
found 2 days ago
Select Aer Lingus flight, departing Tue, Aug 5 from London to Idaho Falls, returning Tue, Aug 19, priced at $1,459 found 2 days ago
Aer Lingus
Tue, Aug 5 - Tue, Aug 19
LCY
London
IDA
Idaho Falls
$1,471 Roundtrip, found 2 days ago
$1,471
Roundtrip
found 2 days ago
Select Aer Lingus flight, departing Tue, Aug 5 from London to Idaho Falls, returning Tue, Aug 19, priced at $1,471 found 2 days ago
KLM
Wed, Aug 20 - Wed, Aug 27
LCY
London
IDA
Idaho Falls
$1,489 Roundtrip, found 4 days ago
$1,489
Roundtrip
found 4 days ago
Select KLM flight, departing Wed, Aug 20 from London to Idaho Falls, returning Wed, Aug 27, priced at $1,489 found 4 days ago
KLM
Wed, Aug 20 - Wed, Aug 27
LCY
London
IDA
Idaho Falls
$1,530 Roundtrip, found 4 days ago
$1,530
Roundtrip
found 4 days ago
Select KLM flight, departing Wed, Aug 20 from London to Idaho Falls, returning Wed, Aug 27, priced at $1,530 found 4 days ago
Aer Lingus
Tue, Aug 5 - Tue, Aug 19
LCY
London
IDA
Idaho Falls
$1,533 Roundtrip, found 2 days ago
$1,533
Roundtrip
found 2 days ago
Select Aer Lingus flight, departing Tue, Aug 5 from London to Idaho Falls, returning Tue, Aug 19, priced at $1,533 found 2 days ago
Aer Lingus
Tue, Aug 5 - Tue, Aug 19
LCY
London
IDA
Idaho Falls
$1,539 Roundtrip, found 2 days ago
$1,539
Roundtrip
found 2 days ago
Select Aer Lingus flight, departing Tue, Aug 5 from London to Idaho Falls, returning Tue, Aug 19, priced at $1,539 found 2 days ago
Aer Lingus
Tue, Aug 5 - Tue, Aug 19
LCY
London
IDA
Idaho Falls
$1,552 Roundtrip, found 2 days ago
$1,552
Roundtrip
found 2 days ago
Select Aer Lingus flight, departing Tue, Aug 5 from London to Idaho Falls, returning Tue, Aug 19, priced at $1,552 found 2 days ago
Aer Lingus
Wed, Aug 20 - Thu, Aug 21
LCY
London
IDA
Idaho Falls
$2,472 Roundtrip, found 4 days ago
$2,472
Roundtrip
found 4 days ago
Select Aer Lingus flight, departing Wed, Aug 20 from London to Idaho Falls, returning Thu, Aug 21, priced at $2,472 found 4 days ago
Aer Lingus
Wed, Aug 20 - Thu, Aug 21
LCY
London
IDA
Idaho Falls
$3,047 Roundtrip, found 4 days ago
$3,047
Roundtrip
found 4 days ago
Select Aer Lingus flight, departing Wed, Aug 20 from London to Idaho Falls, returning Thu, Aug 21, priced at $3,047 found 4 days ago

Alternative airports near Idaho Falls

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Idaho Falls Regional IDA. Cheapest and Closest option available. Average driving time to city center is 5 minutes. Flights from $1,454
IDA
Idaho Falls Regional
CheapestClosest
Average driving time to city center5 min
Flights from $1,454
Flights from London (LCY) to Idaho Falls (IDA)
Origin airport
London City
Destination airport
Idaho Falls Regional
Roundtrip price
$1,454
Distance
4722 mi

London to Idaho Falls Flights

The cheapest times to fly from London to Idaho Falls

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from London to Idaho Falls are during the month of August. You can find some of the cheapest flights from London to Idaho Falls with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from London to Idaho Falls

Sunday is one of the best days to book for cheap flights from London to Idaho Falls: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from London to Idaho Falls

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from London to Idaho Falls in 2025. You can also book with separate airlines for your outbound and return journeys, from $1,146 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap London to Idaho Falls flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your London to Idaho Falls airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from London City Airport (LCY) to Idaho Falls Regional Airport (IDA) cost?
Discover the latest flight deals from LCY to IDA by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from LCY to IDA?
The cheapest flights from LCY to IDA are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from LCY to IDA?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from LCY to IDA. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from London City Airport (LCY) to Idaho Falls Regional Airport (IDA)?
You'll have to take a flight with a layover when traveling from London City Airport (LCY) to Idaho Falls Regional Airport (IDA). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from LCY to IDA?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from London City Airport (LCY) to Idaho Falls Regional Airport (IDA)?
To avoid possible delays on the London City Airport (LCY) to Idaho Falls Regional Airport (IDA) route, travel before 3 PM. Later departures are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from London City Airport (LCY) to Idaho Falls Regional Airport (IDA) last-minute?
Booking your flight from LCY to IDA shortly before your journey is typically more expensive. But if there's some wiggle room with your travel dates and times, you could snag a cheap last-minute fare.
Is it cheaper to book a LCY to IDA flight and hotel package?
Opting for a LCY to IDA flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Select from our wide range of accommodations and then add car rentals, flights and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from London City Airport (LCY) to Idaho Falls Regional Airport (IDA)?
Typically, you can cancel or reschedule your LCY to IDA flight. However, additional charges may apply, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline's guidelines and fees on flight changes, or if you need further details, visit our Customer Service portal.

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*Available to One Key members.