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$399+ Cheap flights from Portland, ME to Casper (PWM - CPR)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — CPR
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap flight deals from Portland to Casper

Best flights from Portland to Casper
Discover carefully curated flight deals from Portland to Casper that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 15, 2025.

This United Airlines deal was found by Cheapflights users on 12/12. 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.
Sat 1/248:40 amPWM - CPR
2 stops12h 26mUnited Airlines
Wed 1/2811:28 amCPR - PWM
2 stops10h 02mUnited Airlines
Deal found 12/12$399

Find flight deals from Portland to Casper

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to Casper (CPR). 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 December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$399
(United Airlines)
Provider with most accurate pricing for Portland-Casper Natrona County flight deals.
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Provider most trusted by Cheapflights users for Portland-Casper Natrona County flights.
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From Portland to Casper Natrona County
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Casper 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 2,558,603 searches. Data last updated December 15, 2025.
Use the filters below to find and compare flights from Portland to Casper that are best for you.

Fly from

Portland

Fly to

Casper

Route

Depart

Return

Price

PortlandCasper

PWM - CPR

PWMCPR

Portland

Sat 1/24

8:40 am-7:06 pm

2 stops12h 26m

Casper Natrona County

Wed 1/28

11:28 am-11:30 pm

2 stops10h 02m

$399

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/12

Compare providers for flights from Portland to Casper

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Casper in December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland, Maine-Casper flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland, Maine-Casper flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Portland, Maine-Casper flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland, Maine-Casper flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland, Maine-Casper flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to Casper

Have a flexible travel schedule? Discover the best time to fly to Casper 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.

Related info for your journey

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

  • How long is the flight from Portland, Maine to Casper?

    A quick flight from Portland, Maine to Casper can take about 9h 43m. United Airlines provides one of the quickest options available for as low as $399. Portland, Maine and Casper are separated by a distance of 1804 mi.

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

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

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

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

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

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

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