Cheap Flights from Bellingham (BLI) to Boulder (WBU)

Popular airlines from Bellingham, WA (BLI-Bellingham Intl.) to Boulder, CO (WBU-Boulder Municipal)

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Frequently asked questions

How much does a flight from Bellingham Intl. Airport (BLI) to Boulder, CO (WBU-Boulder Municipal) cost?
Grab a cheap one-way flight or cheap return flight from Bellingham Intl. Airport (BLI) to Boulder, CO (WBU-Boulder Municipal) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Bellingham Intl. Airport (BLI) to Boulder, CO (WBU-Boulder Municipal)?
is the cheapest month to fly from BLI to WBU. Traveling during an off-peak travel window is often the key to scoring lower fares.
What is the cheapest airline that flies from Bellingham Intl. Airport (BLI) to Boulder, CO (WBU-Boulder Municipal)?
To find the cheapest airline flying from BLI to WBU, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Bellingham Intl. Airport (BLI) to Boulder, CO (WBU-Boulder Municipal)?
You'll have to book a flight with a layover when traveling from Bellingham Intl. Airport (BLI) to Boulder, CO (WBU-Boulder Municipal). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from BLI to WBU?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can change depending on a range of factors, such as 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 Bellingham Intl. Airport (BLI) to Boulder, CO (WBU-Boulder Municipal)?
Opt for a flight from Bellingham Intl. Airport (BLI) to Boulder, CO (WBU-Boulder Municipal) that takes off before 3 PM to reduce the risk of delays and cancellations. Departures after this time are on average 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 Bellingham Intl. Airport (BLI) to Boulder, CO (WBU-Boulder Municipal) last-minute?
Holding off until right before your break to book your flight from BLI to WBU often results in higher prices. Although you may find some last-minute offers, there's no guarantee. Be flexible with your travel plans for a better chance of snagging a bargain.
Is it cheaper to book a BLI to WBU flight and hotel package?
Booking a BLI to WBU flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Choose from our wide range of accommodations and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Bellingham Intl. Airport (BLI) to Boulder, CO (WBU-Boulder Municipal)?
If you reserved your BLI to WBU flight within 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, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Bellingham Intl.
Destination airport
Boulder Municipal
Distance
1042 mi

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Bellingham to Boulder Flights

The cheapest times to fly from Bellingham to Boulder

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

 

The best time to book a flight from Bellingham to Boulder

Sunday is one of the best days to book for cheap flights from Bellingham to Boulder: 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 Bellingham to Boulder

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 Bellingham to Boulder in 2025. You can also book with separate airlines for your outbound and return journeys, from 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 Bellingham to Boulder 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 Bellingham to Boulder 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.

 

Bellingham to Boulder Flights

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*Available to One Key members.