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$43+ Cheap flights from Portland (PDX) to Boulder, CO

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/22. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — DEN
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
1 adult, Economy
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The best prices from Portland to Boulder are usually found in September or January, booked 83 days in advance, depart on a Saturday or Thursday and return on a Saturday

Cheap flight deals from Portland to Boulder

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Boulder (BD9). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 21, 2024.

Popular in

March

Cheapest in

September

Round-trip from

$84
(Frontier)

One-way from

$43
(Cheapflightsfares)
High demand for flights, 20% potential price rise
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Best time to find cheap flights, 21% potential price drop
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From Portland to Boulder
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One-way flight from Portland to Boulder
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Find flight deals from Portland to Boulder

Cheapest flights from Portland to Boulder
Explore the most affordable flight options available from Portland to Boulder. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2024.

This Kiwi.com deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/612:03 pmPDX - DEN
Nonstop2h 29mFrontier
Wed 12/1110:15 pmDEN - PDX
Nonstop3h 00mFrontier
Deal found 11/19$85
This Delta deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/113:20 pmPDX - DEN
1 stop7h 24mDelta
Wed 12/186:25 pmDEN - PDX
1 stop5h 35mDelta
Deal found 11/20$183
This Expedia deal was found by Cheapflights users on 11/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/512:13 pmPDX - DEN
1 stop6h 02mMultiple Airlines
Tue 12/104:56 pmDEN - PDX
1 stop4h 59mMultiple Airlines
Deal found 11/21$202
This United Airlines deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/109:54 amPDX - DEN
1 stop6h 46mUnited Airlines
Sat 12/141:25 pmDEN - PDX
1 stop6h 10mUnited Airlines
Deal found 11/20$217
This Alaska Airlines deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/207:25 amPDX - DEN
Nonstop2h 32mAlaska Airlines
Tue 12/245:10 pmDEN - PDX
1 stop6h 46mAlaska Airlines
Deal found 11/20$219
This Southwest deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/134:30 pmPDX - DEN
1 stop6h 45mSouthwest
Sun 1/1212:55 pmDEN - PDX
2 stops8h 20mSouthwest
Deal found 11/20$261

Find flights from Portland to Boulder within your budget

Customize your flight search to find flights from Portland to Boulder that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,629,791 searches. Data last updated November 21, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PortlandDenver

PDX - DEN

PDXDEN

Portland

Sat 1/4

7:06 pm-7:39 am

1 stop11h 33m

Denver Intl

Sat 1/11

10:15 pm-12:15 am

Nonstop3h 00m

$84

PortlandDenver

PDX - DEN

PDXDEN

Portland

Wed 1/29

4:30 pm-10:36 pm

1 stop5h 06m

Denver Intl

Sun 2/2

10:42 pm-9:45 am

1 stop12h 03m

$166

PortlandDenver

PDX - DEN

PDXDEN

Portland

Sat 1/11

1:30 pm-7:21 pm

1 stop4h 51m

Denver Intl

Wed 1/15

6:05 pm-11:54 pm

1 stop6h 49m

$176

PortlandDenver

PDX - DEN

PDXDEN

Portland

Sun 2/16

9:40 am-11:49 pm

1 stop13h 09m

Denver Intl

Wed 2/19

7:00 am-10:54 am

1 stop4h 54m

$182

PortlandDenver

PDX - DEN

PDXDEN

Portland

Tue 12/10

3:20 pm-9:52 pm

1 stop5h 32m

Denver Intl

Sat 12/14

3:45 pm-8:13 pm

1 stop5h 28m

$221

PortlandDenver

PDX - DEN

PDXDEN

Portland

Fri 12/13

4:30 pm-12:15 am

1 stop6h 45m

Denver Intl

Sun 1/12

12:55 pm-8:15 pm

2 stops8h 20m

$261

PortlandDenver

PDX - DEN

PDXDEN

Portland

Sat 2/22

6:32 am-10:13 am

Nonstop2h 41m

$43

PortlandDenver

PDX - DEN

PDXDEN

Portland

Sat 1/11

10:16 am-3:20 pm

1 stop4h 04m

$88

PortlandDenver

PDX - DEN

PDXDEN

Portland

Sat 3/1

5:15 pm-11:49 pm

1 stop5h 34m

$91

PortlandDenver

PDX - DEN

PDXDEN

Portland

Tue 3/18

1:39 pm-9:45 pm

1 stop7h 06m

$98

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 14 results
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Best time to book a flight from Portland to Boulder

Have a flexible travel schedule? Discover the best time to fly to Boulder from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Portland to Boulder

Get recent, data-driven insights about flights from Portland to Boulder including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Portland to Boulder?

Use this chart to determine the optimal time to book a round-trip flight from Portland to Boulder. Price data was last updated on November 15, 2024.

To ensure you get the cheapest price possible for a flight from Portland to Boulder, you should look to book at least 83 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Portland to Boulder?

Currently, October is the cheapest month in which you can book a flight from Portland to Boulder (average of $197). Flying from Portland to Boulder in March is currently the most expensive (average of $270). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PDX to BD9?

Find hourly flight availability from Portland to Boulder. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 21, 2024.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portland to Boulder as you normally would.

What is the cheapest day to fly from Portland to Boulder?

Use this chart to determine the cheapest time to fly round-trip from Portland to Boulder. Price data was last updated on June 2, 2024.

Travelers seeking maximum savings on their Portland to Boulder flight should consider departing on Tuesday evenings when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Portland to Boulder

Explore weekly flight availability from Portland to Boulder. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated November 21, 2024.

The most flights from PDX to BD9 are scheduled on a Monday (18 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (3 on average).

Rainfall in Boulder by month

Plan your trip to Boulder by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Boulder ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Boulder when rainfall is around 0.5 in.

Temperature in Boulder by month

Plan your trip to Boulder by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Boulder, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Boulder

Get insights into the airlines that provide service to Boulder. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boulder. Reviews last updated November 21, 2024.
See what other customers who have flown with Frontier, Delta and Alaska Airlines from Portland to Boulder have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,015 reviews

Entertainment

7.7

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,015 reviews
Southwest
8.1
Very good
5,015 reviews

Entertainment

7.7

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Alaska Airlines
8.0
Very good
9,458 reviews
Southwest
8.1
Very good
5,015 reviews

Entertainment

7.7

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,759 reviews
Southwest
8.1
Very good
5,015 reviews

Entertainment

7.7

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,173 reviews
Southwest
8.1
Very good
5,015 reviews

Entertainment

7.7

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
5,015 reviews

Entertainment

7.7

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.2

Overall

8.1

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Related info for your journey

Find useful and relevant information for your journey from Portland to Boulder. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Portland to Boulder?

    Most people fly from Portland (PDX) if they book a flight from Portland to Boulder. On average, Portland has 12 outbound flights to Boulder per day from 6 airlines. Portland is conveniently located just 6.0 mi from Portland’s city center.

  • How popular is this Portland to Boulder flight route?

    Within the past month, 265 users have taken a look at flights from Portland to Boulder.

  • What are the cheapest airlines to fly from Portland to Boulder one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $43. Delta flights start at $88 while deals on Alaska Airlines start at $91 one-way.

  • What are the most reliable airlines from Portland to Boulder?

    Consider SWISS (100%), Lufthansa (96%) or United Airlines (95%) when booking your flight. These represent the most reliable airlines when flying from Portland to Boulder.

  • What are the cheapest flights from Portland to Boulder?

    Looking for the cheapest flight from Portland to Boulder? While on average our users pay $794, our data indicates the cheapest price to be $61. The most popular route (Portland - Denver Intl), is priced around $113.

  • Can I find deals for flights from Portland to Boulder that include hotel bookings?

    Yes. In addition to deals on Portland to Boulder flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Boulder?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Boulder.

  • Can I find deals for business class flights from Portland to Boulder?

    Yes. Cheapflights offers flight deals from Portland to Boulder by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portland to Boulder?

    Currently, October is the cheapest month in which you can book a flight from Portland to Boulder (average of $197). Flying from Portland to Boulder in March is currently the most expensive (average of $270). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Portland to Boulder

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Portland to Boulder

Discover the top 6 airlines that operate flights from Portland to Boulder. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,629,791 searches. Data last updated November 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$55Average$112FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$100Average$243FlexibilityNo cancel feeOn-time75%
DeltaCheapest$131Average$277FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$138Average$316FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$138Average$387FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$157Average$468FlexibilityNo cancel feeOn-time71%
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