$239 Cheap Flights from Bismarck (BIS) to Idaho Falls (IDA)

View $239 flight on Sun, Jan 18, 2026Opens in a new window

Popular airlines from Bismarck, ND (BIS-Bismarck Municipal) to Idaho Falls Regional Airport (IDA)

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Cheap Flights from Bismarck to Idaho Falls (BIS-IDA)

Prices were available within the past 7 days and start at $239 for one-way flights and $319 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, May 9 - Thu, May 28
BIS
Bismarck
IDA
Idaho Falls
$319 Roundtrip, found 2 days ago
$319
Roundtrip
found 2 days ago
Select United flight, departing Sat, May 9 from Bismarck to Idaho Falls, returning Thu, May 28, priced at $319 found 2 days ago
United
Mon, Dec 8 - Wed, Dec 24
BIS
Bismarck
IDA
Idaho Falls
$334 Roundtrip, found 2 days ago
$334
Roundtrip
found 2 days ago
Select United flight, departing Mon, Dec 8 from Bismarck to Idaho Falls, returning Wed, Dec 24, priced at $334 found 2 days ago
Delta
Tue, Jan 13 - Sat, Jan 24
BIS
Bismarck
IDA
Idaho Falls
$343 Roundtrip, found 2 days ago
$343
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Jan 13 from Bismarck to Idaho Falls, returning Sat, Jan 24, priced at $343 found 2 days ago
United
Sat, Dec 6 - Tue, Dec 9
BIS
Bismarck
IDA
Idaho Falls
$349 Roundtrip, found 4 days ago
$349
Roundtrip
found 4 days ago
Select United flight, departing Sat, Dec 6 from Bismarck to Idaho Falls, returning Tue, Dec 9, priced at $349 found 4 days ago
Delta
Wed, Jan 28 - Sat, Feb 14
BIS
Bismarck
IDA
Idaho Falls
$358 Roundtrip, found 2 days ago
$358
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Jan 28 from Bismarck to Idaho Falls, returning Sat, Feb 14, priced at $358 found 2 days ago
United
Wed, Apr 15 - Sun, May 3
BIS
Bismarck
IDA
Idaho Falls
$364 Roundtrip, found 2 days ago
$364
Roundtrip
found 2 days ago
Select United flight, departing Wed, Apr 15 from Bismarck to Idaho Falls, returning Sun, May 3, priced at $364 found 2 days ago
Delta
Sun, May 10 - Thu, May 28
BIS
Bismarck
IDA
Idaho Falls
$369 Roundtrip, found 2 days ago
$369
Roundtrip
found 2 days ago
Select Delta flight, departing Sun, May 10 from Bismarck to Idaho Falls, returning Thu, May 28, priced at $369 found 2 days ago
Delta
Sat, May 9 - Thu, May 28
BIS
Bismarck
IDA
Idaho Falls
$373 Roundtrip, found 2 days ago
$373
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, May 9 from Bismarck to Idaho Falls, returning Thu, May 28, priced at $373 found 2 days ago
United
Sat, May 9 - Wed, May 27
BIS
Bismarck
IDA
Idaho Falls
$378 Roundtrip, found 2 days ago
$378
Roundtrip
found 2 days ago
Select United flight, departing Sat, May 9 from Bismarck to Idaho Falls, returning Wed, May 27, priced at $378 found 2 days ago
American Airlines
Fri, Jan 16 - Mon, Jan 19
BIS
Bismarck
IDA
Idaho Falls
$932 Roundtrip, found 3 days ago
$932
Roundtrip
found 3 days ago
Select American Airlines flight, departing Fri, Jan 16 from Bismarck to Idaho Falls, returning Mon, Jan 19, priced at $932 found 3 days ago

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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 $334
IDA
Idaho Falls Regional
CheapestClosest
Average driving time to city center5 min
Flights from $334
Flights from Bismarck (BIS) to Idaho Falls (IDA)
Origin airport
Bismarck Municipal
Destination airport
Idaho Falls Regional
Airlines serving
American Airlines, United
Roundtrip price
$318
Distance
594 mi

Bismarck to Idaho Falls Flights

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

 

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

Sunday is one of the best days to book for cheap flights from Bismarck 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 Bismarck 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 Bismarck to Idaho Falls in 2025. You can also book with separate airlines for your outbound and return journeys, from $239 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 Bismarck 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 Bismarck 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 Bismarck Municipal Airport (BIS) to Idaho Falls Regional Airport (IDA) cost?
Lock in a cheap one-way flight from $239 or cheap return flight from $319 from Bismarck Municipal Airport (BIS) to Idaho Falls Regional Airport (IDA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Bismarck Municipal Airport (BIS) to Idaho Falls Regional Airport (IDA)?
May is the cheapest month to fly from BIS to IDA. Traveling during quieter months is often the key to finding better fares.
What is the cheapest airline that flies from Bismarck Municipal Airport (BIS) to Idaho Falls Regional Airport (IDA)?
To find the cheapest airline that'll fly you from BIS to IDA, use Expedia's filter tool. Customize your search based on what matters most to you, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Bismarck Municipal Airport (BIS) to Idaho Falls Regional Airport (IDA)?
There are no daily nonstop flights from Bismarck Municipal Airport (BIS) to Idaho Falls Regional Airport (IDA). But you can book flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be soaring above the clouds in no time at all.
What day of the week has the most flights from BIS to IDA?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Bismarck Municipal Airport (BIS) to Idaho Falls Regional Airport (IDA)?
To reach Idaho Falls Regional Airport (IDA) on time, select a flight that takes off from Bismarck Municipal Airport (BIS) before 3 PM. The likelihood 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 Bismarck Municipal Airport (BIS) to Idaho Falls Regional Airport (IDA) last-minute?
Booking your ticket from BIS to IDA just before your journey is typically more expensive. However, if you're flexible with your departure dates and times, you could score a cheap last-minute fare.
Is it cheaper to book a BIS to IDA flight and hotel package?
Opting for a BIS to IDA flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Choose from our impressive range of hotels and then add activities, flights and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Bismarck Municipal Airport (BIS) to Idaho Falls Regional Airport (IDA)?
Generally, it's possible to cancel or reschedule your BIS to IDA flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.