$149 Cheap Flights from Idaho Falls (IDA) to Billings (BIL)

View $149 flight on Wed, May 28, 2025Opens in a new window

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Find available prices by choosing your travel dates.

Cheap Flights from Idaho Falls to Billings (IDA-BIL)

Prices were available within the past 7 days and start at $149 for one-way flights and $297 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, May 28 - Tue, Jun 10
IDA
Idaho Falls
BIL
Billings
$297 Roundtrip, found 5 days ago
$297
Roundtrip
found 5 days ago
Select Delta flight, departing Wed, May 28 from Idaho Falls to Billings, returning Tue, Jun 10, priced at $297 found 5 days ago
Delta
Tue, May 13 - Tue, May 27
IDA
Idaho Falls
BIL
Billings
$304 Roundtrip, found 5 days ago
$304
Roundtrip
found 5 days ago
Select Delta flight, departing Tue, May 13 from Idaho Falls to Billings, returning Tue, May 27, priced at $304 found 5 days ago
Delta
Sun, May 11 - Tue, May 20
IDA
Idaho Falls
BIL
Billings
$314 Roundtrip, found 3 days ago
$314
Roundtrip
found 3 days ago
Select Delta flight, departing Sun, May 11 from Idaho Falls to Billings, returning Tue, May 20, priced at $314 found 3 days ago
Delta
Thu, Jun 26 - Tue, Jul 15
IDA
Idaho Falls
BIL
Billings
$317 Roundtrip, found 5 days ago
$317
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, Jun 26 from Idaho Falls to Billings, returning Tue, Jul 15, priced at $317 found 5 days ago
United
Wed, May 28 - Thu, Jun 12
IDA
Idaho Falls
BIL
Billings
$321 Roundtrip, found 5 days ago
$321
Roundtrip
found 5 days ago
Select United flight, departing Wed, May 28 from Idaho Falls to Billings, returning Thu, Jun 12, priced at $321 found 5 days ago
Delta
Sun, May 11 - Wed, May 21
IDA
Idaho Falls
BIL
Billings
$331 Roundtrip, found 3 days ago
$331
Roundtrip
found 3 days ago
Select Delta flight, departing Sun, May 11 from Idaho Falls to Billings, returning Wed, May 21, priced at $331 found 3 days ago
Delta
Sun, Jun 8 - Sat, Jun 21
IDA
Idaho Falls
BIL
Billings
$334 Roundtrip, found 5 days ago
$334
Roundtrip
found 5 days ago
Select Delta flight, departing Sun, Jun 8 from Idaho Falls to Billings, returning Sat, Jun 21, priced at $334 found 5 days ago
Hawaiian Airlines
Wed, May 28 - Mon, Jun 9
IDA
Idaho Falls
BIL
Billings
$403 Roundtrip, found 5 days ago
$403
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Wed, May 28 from Idaho Falls to Billings, returning Mon, Jun 9, priced at $403 found 5 days ago
Alaska Airlines
Sun, May 4 - Sun, May 11
IDA
Idaho Falls
BIL
Billings
$412 Roundtrip, found 4 days ago
$412
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sun, May 4 from Idaho Falls to Billings, returning Sun, May 11, priced at $412 found 4 days ago
American Airlines
Fri, May 9 - Mon, May 12
IDA
Idaho Falls
BIL
Billings
$1,131 Roundtrip, found 1 day ago
$1,131
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, May 9 from Idaho Falls to Billings, returning Mon, May 12, priced at $1,131 found 1 day ago
Flights from Idaho Falls (IDA) to Billings (BIL)
Origin airport
Idaho Falls Regional
Destination airport
Logan Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
$296
Distance
234 mi

Idaho Falls to Billings Flights

The cheapest times to fly from Idaho Falls to Billings

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 Idaho Falls to Billings are during the month of May. You can find some of the cheapest flights from Idaho Falls to Billings with Expedia's search tool and vast selection of airlines.

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

Sunday is one of the best days to book for cheap flights from Idaho Falls to Billings: 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 Idaho Falls to Billings

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 Idaho Falls to Billings in 2025. You can also book with separate airlines for your outbound and return journeys, from $149 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 Idaho Falls to Billings 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 Idaho Falls to Billings 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 Idaho Falls Regional Airport (IDA) to Logan Intl. Airport (BIL) cost?
Discover the latest flight deals from IDA to BIL 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 IDA to BIL?
The cheapest flights from IDA to BIL 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 IDA to BIL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from IDA to BIL. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Idaho Falls Regional Airport (IDA) to Logan Intl. Airport (BIL)?
Direct flights from Idaho Falls Regional Airport (IDA) to Logan Intl. Airport (BIL) aren’t available daily, so you’ll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel dates and pick either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from IDA to BIL?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can vary depending on various factors, including the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Idaho Falls Regional Airport (IDA) to Logan Intl. Airport (BIL)?
To touch down at Logan Intl. Airport (BIL) on schedule, book a flight that leaves from Idaho Falls Regional Airport (IDA) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 Idaho Falls Regional Airport (IDA) to Logan Intl. Airport (BIL) last-minute?
Booking your flight from IDA to BIL just before your trip is generally more expensive. However, if you’re flexible with your itinerary, you could land a cheap last-minute fare.
Is it cheaper to book an IDA to BIL flight and hotel package?
Compared with arranging flights and hotels separately, booking an IDA to BIL flight and hotel package with Expedia could lead to significant savings. Better still, having it all in one place will take the hassle out of planning your trip. Just secure your flights and choose from our extensive range of hotels, then customize your trip with other add-ons like car rentals and activities.
Can I cancel or change the date of my flight from Idaho Falls Regional Airport (IDA) to Logan Intl. Airport (BIL)?
You can usually reschedule or cancel your IDA to BIL flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Refer to your airline’s policies in your itinerary to see what changes are allowed and if any costs are involved. You’ll also find further details on our Customer Service portal.

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*Available to One Key members.