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$353+ Cheap flights from Portland, ME to Casper (PWM - CPR)

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 2/23. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — CPR
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap 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 January 29, 2026.

This United Airlines deal was found by Cheapflights users on 1/28. 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 11/35:30 am
PWM
-
CPR
2 stops13h 34m
United Airlines
Sat 11/77:00 am
CPR
-
PWM
2 stops14h 59m
United Airlines
Deal found 1/28$399
This United Airlines deal was found by Cheapflights users on 1/28. 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 5/167:10 pm
PWM
-
CPR
2 stops29h 00m
United Airlines
Sun 5/316:08 pm
CPR
-
PWM
2 stops21h 34m
United Airlines
Deal found 1/28$1,396
This United Airlines deal was found by Cheapflights users on 1/28. 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 5/143:23 pm
PWM
-
CPR
1 stop6h 54m
United Airlines
Sun 5/317:00 am
CPR
-
PWM
1 stop6h 49m
United Airlines
Deal found 1/28$1,581
This United Airlines deal was found by Cheapflights users on 1/28. 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.
Sun 5/173:23 pm
PWM
-
CPR
1 stop8h 47m
United Airlines
Sun 5/317:00 am
CPR
-
PWM
1 stop6h 49m
United Airlines
Deal found 1/28$1,886
This United Airlines deal was found by Cheapflights users on 1/28. 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.
Fri 5/156:00 am
PWM
-
CPR
2 stops10h 39m
United Airlines
Sun 5/317:00 am
CPR
-
PWM
1 stop6h 49m
United Airlines
Deal found 1/28$1,986

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,396
(United Airlines)

One-way from

$353
(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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One-way flight 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 January 29, 2026.
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 5/16

7:10 pm-10:10 pm

2 stops29h 00m

Casper Natrona County

Sun 5/31

6:08 pm-5:42 pm

2 stops21h 34m

$1,396

PortlandCasper

PWM - CPR

PWMCPR

Portland

Thu 5/14

3:23 pm-8:17 pm

1 stop6h 54m

Casper Natrona County

Sun 5/31

7:00 am-3:49 pm

1 stop6h 49m

$1,581

PortlandCasper

PWM - CPR

PWMCPR

Portland

Fri 5/15

6:00 am-2:39 pm

2 stops10h 39m

Casper Natrona County

Sun 5/31

7:00 am-3:49 pm

1 stop6h 49m

$1,986

PortlandCasper

PWM - CPR

PWMCPR

Portland

Sun 5/17

6:00 am-2:39 pm

2 stops10h 39m

Casper Natrona County

Sun 5/31

7:00 am-3:49 pm

1 stop6h 49m

$2,084

PortlandCasper

PWM - CPR

PWMCPR

Portland

Mon 2/23

5:45 am-5:01 pm

2 stops13h 16m

$353

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

  • Most accurate provider: When it comes to deals on Portland, Maine-Casper flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland, Maine-Casper flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 29h. United Airlines provides one of the quickest options available for as low as $1,396. 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.

See more FAQs

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