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 $504). 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 day to fly from Portland, Maine to Casper?

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

In terms of precipitation, rainfall in Casper ranges from 0.5 - 2.0 inches per month. May is typically the wettest month, when rainfall can reach 2.0 in. January is typically the driest time to visit Casper when rainfall is around 0.5 in.

If weather is an important factor for your trip to Casper, 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 69.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 23.0 F).

What is the cheapest time of day to fly from PWM to CPR?

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

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.

$379+ Flights from Portland, ME to Casper

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Cheap flight deals from Portland to Casper

Round-trip from	$379 (United Airlines)

From Portland to Casper Natrona County

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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 July 29, 2025.

Sat 8/306:14 amPWM - CPR

2 stops18h 00mUnited Airlines

Wed 9/39:10 amCPR - PWM

2 stops10h 49mUnited Airlines

Deal found 7/28

$379

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 July 29, 2025.

Sat 8/306:14 amPWM - CPR

2 stops18h 00mUnited Airlines

Wed 9/37:05 amCPR - PWM

2 stops12h 54mUnited Airlines

Deal found 7/27

$379

Last-minute flights from Portland to Casper
Discover last-minute flight deals from Portland to Casper. Data last updated July 29, 2025 and is based on user searches.

Sat 8/306:14 amPWM - CPR

2 stops18h 00mUnited Airlines

Wed 9/37:05 amCPR - PWM

2 stops12h 54mUnited Airlines

Deal found 7/27

$379

Fly from

Fly to

Route

Depart

Return

Price

PortlandCasper

PWM - CPR

PWMCPR

Portland

Sat 8/30

6:14 am-10:14 pm

2 stops18h 00m

Casper Natrona County

Wed 9/3

7:05 am-9:59 pm

2 stops12h 54m

$379

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

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.

Reviews of airlines servicing Casper

Peruse reviews from past customers who have flown with United Airlines from Portland to Casper to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,896 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

United Airlines

7.4

Good

8,896 reviews

United Airlines

7.4

Good

8,896 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

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 $504). 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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$379+ 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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Portland to Casper with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Portland to Casper

Round-trip from

Find flight deals from Portland to Casper

Cheapest flights from Portland to CasperExplore 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 July 29, 2025.

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 July 29, 2025.

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Use the filters below to find and compare flights from Portland to Casper that are best for you.

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.

Reviews of airlines servicing Casper

Get insights into the airlines that provide service to Casper. 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 Casper. Reviews last updated July 29, 2025.

Peruse reviews from past customers who have flown with United Airlines from Portland to Casper to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

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.

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

How can I find direct flights from Portland to Casper?

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

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

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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 July 29, 2025.