$166 Cheap Flights from Bismarck (BIS) to Portland (PWM)

View $166 flight on Tue, Sep 9, 2025Opens in a new window

Popular airlines from Bismarck, ND (BIS-Bismarck Municipal) to Portland Intl. Jetport Airport (PWM)

Cheap Flights from Bismarck to Portland (BIS-PWM)

Prices were available within the past 7 days and start at $166 for one-way flights and $269 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Aug 19 - Tue, Aug 26
BIS
Bismarck
PWM
Portland
$269 Roundtrip, found 4 hours ago
$269
Roundtrip
found 4 hours ago
Select Delta flight, departing Tue, Aug 19 from Bismarck to Portland, returning Tue, Aug 26, priced at $269 found 4 hours ago
American Airlines
Mon, Aug 11 - Wed, Aug 20
BIS
Bismarck
PWM
Portland
$269 Roundtrip, found 3 days ago
$269
Roundtrip
found 3 days ago
Select American Airlines flight, departing Mon, Aug 11 from Bismarck to Portland, returning Wed, Aug 20, priced at $269 found 3 days ago
Delta
Fri, Aug 15 - Tue, Aug 26
BIS
Bismarck
PWM
Portland
$274 Roundtrip, found 4 hours ago
$274
Roundtrip
found 4 hours ago
Select Delta flight, departing Fri, Aug 15 from Bismarck to Portland, returning Tue, Aug 26, priced at $274 found 4 hours ago
Delta
Fri, Aug 15 - Sat, Sep 6
BIS
Bismarck
PWM
Portland
$279 Roundtrip, found 4 hours ago
$279
Roundtrip
found 4 hours ago
Select Delta flight, departing Fri, Aug 15 from Bismarck to Portland, returning Sat, Sep 6, priced at $279 found 4 hours ago
Delta
Thu, Aug 28 - Thu, Sep 11
BIS
Bismarck
PWM
Portland
$294 Roundtrip, found 4 hours ago
$294
Roundtrip
found 4 hours ago
Select Delta flight, departing Thu, Aug 28 from Bismarck to Portland, returning Thu, Sep 11, priced at $294 found 4 hours ago
Delta
Mon, Sep 1 - Tue, Sep 16
BIS
Bismarck
PWM
Portland
$295 Roundtrip, found 6 days ago
$295
Roundtrip
found 6 days ago
Select Delta flight, departing Mon, Sep 1 from Bismarck to Portland, returning Tue, Sep 16, priced at $295 found 6 days ago
American Airlines
Thu, Sep 4 - Sat, Sep 6
BIS
Bismarck
PWM
Portland
$299 Roundtrip, found 2 days ago
$299
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, Sep 4 from Bismarck to Portland, returning Sat, Sep 6, priced at $299 found 2 days ago
Delta
Sat, Aug 16 - Wed, Sep 3
BIS
Bismarck
PWM
Portland
$299 Roundtrip, found 4 hours ago
$299
Roundtrip
found 4 hours ago
Select Delta flight, departing Sat, Aug 16 from Bismarck to Portland, returning Wed, Sep 3, priced at $299 found 4 hours ago
Delta
Tue, Oct 21 - Wed, Nov 5
BIS
Bismarck
PWM
Portland
$300 Roundtrip, found 6 days ago
$300
Roundtrip
found 6 days ago
Select Delta flight, departing Tue, Oct 21 from Bismarck to Portland, returning Wed, Nov 5, priced at $300 found 6 days ago
United
Tue, Aug 26 - Mon, Sep 8
BIS
Bismarck
PWM
Portland
$444 Roundtrip, found 4 hours ago
$444
Roundtrip
found 4 hours ago
Select United flight, departing Tue, Aug 26 from Bismarck to Portland, returning Mon, Sep 8, priced at $444 found 4 hours ago

Find the cheapest month to fly from Bismarck (BIS) to Portland (PWM)

October is typically the cheapest month to fly

From $266 - $792 per traveler.

Graph displaying average flight prices per month

Flights from Bismarck (BIS) to Portland (PWM)
Origin airport
Bismarck Municipal
Destination airport
Portland Intl. Jetport
Airlines serving
American Airlines, Delta, United
Roundtrip price
$268
Distance
1488 mi

Bismarck to Portland Flights

The cheapest times to fly from Bismarck to Portland

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 Portland are during the month of August. You can find some of the cheapest flights from Bismarck to Portland with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Bismarck to Portland

Sunday is one of the best days to book for cheap flights from Bismarck to Portland: 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 Portland

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 Portland in 2025. You can also book with separate airlines for your outbound and return journeys, from $166 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 Portland 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 Portland 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 Portland Intl. Jetport Airport (PWM) cost?
Discover the latest flight deals from BIS to PWM 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 BIS to PWM?
The cheapest flights from BIS to PWM 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 BIS to PWM?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from BIS to PWM. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Bismarck Municipal Airport (BIS) to Portland Intl. Jetport Airport (PWM)?
There aren't any daily nonstop flights available from Bismarck Municipal Airport (BIS) to Portland Intl. Jetport Airport (PWM). But you can book flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be on your way in no time.
What day of the week has the most flights from BIS to PWM?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can vary depending on various factors, including the time of year and carrier.*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 Portland Intl. Jetport Airport (PWM)?
Opt for a flight from Bismarck Municipal Airport (BIS) to Portland Intl. Jetport Airport (PWM) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures after this time have a 22% higher chance of being canceled, on average.**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 Portland Intl. Jetport Airport (PWM) last-minute?
Holding off until right before your break to book a ticket from BIS to PWM often results in higher prices. Although you may find some last-minute discounts, there's no guarantee. Be flexible with your travel plans for the best chance of snagging a bargain.
Is it cheaper to book a BIS to PWM flight and hotel package?
You can save money by securing a BIS to PWM flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. Once you've chosen your preferred flights and accommodations, you can add extras like activities, car rentals and tours.
Can I cancel or change the date of my flight from Bismarck Municipal Airport (BIS) to Portland Intl. Jetport Airport (PWM)?
If you booked your BIS to PWM flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of fare you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you want more information.

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*Available to One Key members.