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$304+ 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 10/25. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — CPR
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$304
(United Airlines)
From Portland to Casper Natrona County
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Find flight deals from Portland to Casper

Cheapest flights from Portland to Casper
Explore the most affordable flight options available from Portland to Casper. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/10. 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 10/256:14 amPWM - CPR
2 stops12h 39mUnited Airlines
Sat 11/17:00 amCPR - PWM
1 stop6h 48mUnited Airlines
Deal found 9/10$304
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 9/253:39 pmPWM - CPR
1 stop8h 33mUnited Airlines
Mon 9/296:00 pmCPR - PWM
2 stops13h 11mUnited Airlines
Deal found 9/10$424
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Wed 10/86:00 amPWM - CPR
2 stops12h 53mUnited Airlines
Mon 10/136:00 pmCPR - PWM
2 stops23h 41mUnited Airlines
Deal found 9/11$606

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 September 11, 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 10/25

6:14 am-4:53 pm

2 stops12h 39m

Casper Natrona County

Sat 11/1

7:00 am-3:48 pm

1 stop6h 48m

$304

PortlandCasper

PWM - CPR

PWMCPR

Portland

Thu 9/25

9:59 am-10:12 pm

2 stops14h 13m

Casper Natrona County

Mon 9/29

6:00 pm-9:11 am

2 stops13h 11m

$429

PortlandCasper

PWM - CPR

PWMCPR

Portland

Wed 10/8

6:00 am-4:53 pm

2 stops12h 53m

Casper Natrona County

Mon 10/13

6:00 pm-7:41 pm

2 stops23h 41m

$606

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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 12h 39m. United Airlines provides one of the quickest options available for as low as $304. 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.

  • What is the cheapest month to book a flight from Portland, Maine to Casper?

    Currently, January is the cheapest month in which you can book a flight from Portland, Maine to Casper (average of $348). Flying from Portland, Maine to Casper in June is currently the most expensive (average of $500). 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.

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