$271 Cheap Flights from Bismarck (BIS) to Portland (PDX)

View $271 flight on Mon, Jan 26, 2026Opens in a new window

Popular airlines from Bismarck, ND (BIS-Bismarck Municipal) to Portland International Airport (PDX)

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Cheap Flights from Bismarck to Portland (BIS-PDX)

Prices were available within the past 7 days and start at $271 for one-way flights and $259 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, May 7 - Thu, May 28
BIS
Bismarck
PDX
Portland
$259 Roundtrip, found 4 hours ago
$259
Roundtrip
found 4 hours ago
Select Delta flight, departing Thu, May 7 from Bismarck to Portland, returning Thu, May 28, priced at $259 found 4 hours ago
United
Fri, Dec 5 - Tue, Dec 9
BIS
Bismarck
PDX
Portland
$264 Roundtrip, found 15 hours ago
$264
Roundtrip
found 15 hours ago
Select United flight, departing Fri, Dec 5 from Bismarck to Portland, returning Tue, Dec 9, priced at $264 found 15 hours ago
Delta
Sat, Dec 13 - Mon, Jan 5
BIS
Bismarck
PDX
Portland
$269 Roundtrip, found 2 days ago
$269
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Dec 13 from Bismarck to Portland, returning Mon, Jan 5, priced at $269 found 2 days ago
Delta
Wed, May 6 - Thu, May 28
BIS
Bismarck
PDX
Portland
$284 Roundtrip, found 4 hours ago
$284
Roundtrip
found 4 hours ago
Select Delta flight, departing Wed, May 6 from Bismarck to Portland, returning Thu, May 28, priced at $284 found 4 hours ago
United
Mon, Feb 2 - Sat, Feb 21
BIS
Bismarck
PDX
Portland
$286 Roundtrip, found 3 days ago
$286
Roundtrip
found 3 days ago
Select United flight, departing Mon, Feb 2 from Bismarck to Portland, returning Sat, Feb 21, priced at $286 found 3 days ago
United
Fri, Dec 5 - Tue, Dec 9
BIS
Bismarck
PDX
Portland
$289 Roundtrip, found 15 hours ago
$289
Roundtrip
found 15 hours ago
Select United flight, departing Fri, Dec 5 from Bismarck to Portland, returning Tue, Dec 9, priced at $289 found 15 hours ago
Delta
Fri, Feb 6 - Tue, Feb 17
BIS
Bismarck
PDX
Portland
$289 Roundtrip, found 8 hours ago
$289
Roundtrip
found 8 hours ago
Select Delta flight, departing Fri, Feb 6 from Bismarck to Portland, returning Tue, Feb 17, priced at $289 found 8 hours ago
United
Tue, Jan 20 - Tue, Jan 27
BIS
Bismarck
PDX
Portland
$294 Roundtrip, found 4 days ago
$294
Roundtrip
found 4 days ago
Select United flight, departing Tue, Jan 20 from Bismarck to Portland, returning Tue, Jan 27, priced at $294 found 4 days ago
United
Mon, Feb 2 - Sat, Feb 21
BIS
Bismarck
PDX
Portland
$298 Roundtrip, found 3 days ago
$298
Roundtrip
found 3 days ago
Select United flight, departing Mon, Feb 2 from Bismarck to Portland, returning Sat, Feb 21, priced at $298 found 3 days ago
American Airlines
Tue, Jan 20 - Tue, Jan 27
BIS
Bismarck
PDX
Portland
$327 Roundtrip, found 4 days ago
$327
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Jan 20 from Bismarck to Portland, returning Tue, Jan 27, priced at $327 found 4 days ago

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

February is typically the cheapest month to fly

From $198 - $618 per traveler.

Alternative airports near Portland

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

Select flight to Portland Intl. PDX. Cheapest and Closest option available. Average driving time to city center is 17 minutes. Flights from $344
PDX
Portland Intl.
CheapestClosest
Average driving time to city center17 min
Flights from $344
Flights from Bismarck (BIS) to Portland (PDX)
Origin airport
Bismarck Municipal
Destination airport
Portland Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
$258
Distance
1044 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 May. 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 $271 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. Airport (PDX) cost?
Secure a cheap one-way flight from $271 or cheap return flight from $259 from Bismarck Municipal Airport (BIS) to Portland Intl. Airport (PDX) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Bismarck Municipal Airport (BIS) to Portland Intl. Airport (PDX)?
The cheapest month to fly from BIS to PDX is May, when demand is low. Off-peak season is usually when better flight deals are available between these airports.
What is the cheapest airline that flies from Bismarck Municipal Airport (BIS) to Portland Intl. Airport (PDX)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find the carrier with the cheapest BIS to PDX flight.
How many flights per day from Bismarck Municipal Airport (BIS) to Portland Intl. Airport (PDX)?
Direct flights from Bismarck Municipal Airport (BIS) to Portland Intl. Airport (PDX) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from BIS to PDX?
You'll generally 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 Portland Intl. Airport (PDX)?
Opt for a flight from Bismarck Municipal Airport (BIS) to Portland Intl. Airport (PDX) that leaves before 3 PM to reduce the risk of cancellations. Departures later than this 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. Airport (PDX) last-minute?
Booking your flight from BIS to PDX right before your journey is typically more expensive. However, if there's some wiggle room with your travel times and dates, you could bag a cheap last-minute fare.
Is it cheaper to book a BIS to PDX flight and hotel package?
Securing a BIS to PDX flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Pick from our wide range of accommodations and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Bismarck Municipal Airport (BIS) to Portland Intl. Airport (PDX)?
It's generally possible to reschedule or cancel your BIS to PDX flight. However, if it's been more than 24 hours since booking, 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 more information on our Customer Service portal.

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*Available to One Key members.