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Cheap flights from Casper to Portland from $785

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Casper to Portland departing on 7/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Casper to Portland

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:15 am - 11:30 pm
CPR
-
PWM
16h 15m
2 stops
United Airlines Logo
6:00 am - 8:33 pm
PWM
-
CPR
16h 33m
2 stops
$785United Airlines
Wed, Jul 22 - Sun, Jul 26
United Airlines Logo
5:15 am - 11:30 pm
CPR
-
PWM
16h 15m
2 stops
United Airlines Logo
5:15 am - 7:10 pm
PWM
-
CPR
15h 55m
3 stops
$924United Airlines
Wed, Jul 22 - Sun, Jul 26
United Airlines Logo
7:05 am - 3:40 pm
CPR
-
PWM
6h 35m
1 stop
United Airlines Logo
5:15 am - 8:33 pm
PWM
-
CPR
17h 18m
2 stops
$954United Airlines
Wed, Jul 22 - Sun, Jul 26
United Airlines Logo
7:05 am - 3:40 pm
CPR
-
PWM
6h 35m
1 stop
United Airlines Logo
3:37 pm - 7:10 pm
PWM
-
CPR
29h 33m
1 stop
$2,363United Airlines
Wed, Jul 22 - Sun, Jul 26

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Customize your flight search to find flights from Casper to Portland, Maine 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, momondo users made 832,500 searches. Data last updated July 12, 2026.
Use the filters below to find and compare flights from Casper to Portland, Maine that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CasperPortland

CPR - PWM

CPRPWM

Casper Natrona County

Wed 7/22

5:15 am-11:30 pm

2 stops16h 15m

Portland

Sun 7/26

6:00 am-8:33 pm

2 stops16h 33m

$785

CasperPortland

CPR - PWM

CPRPWM

Casper Natrona County

Wed 7/22

5:15 am-11:30 pm

2 stops16h 15m

Portland

Sun 7/26

5:15 am-7:10 pm

3 stops15h 55m

$924
Quickest round-trip

CasperPortland

CPR - PWM

CPRPWM

Casper Natrona County

Wed 7/22

7:05 am-3:40 pm

1 stop6h 35m

Portland

Sun 7/26

5:15 am-8:33 pm

2 stops17h 18m

$954

CasperPortland

CPR - PWM

CPRPWM

Casper Natrona County

Wed 7/22

7:05 am-3:40 pm

1 stop6h 35m

Portland

Sun 7/26

3:37 pm-7:10 pm

1 stop29h 33m

$2,363

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Portland from

How to get the cheapest flight ticket from Casper to Portland, Maine

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Can stopping save me money on Casper to Portland, Maine flights?

You could potentially save up to 32% on your flight if you consider stops on a Casper to Portland, Maine flight.

When to book flights from Casper to Portland, Maine

Are you open to changing your travel dates? Check out the ideal times to fly from Casper to Portland, Maine according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Casper to Portland, Maine (CPR to PWM) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Casper to Portland, Maine

Fastest flight time

16h 15m

Direct flights

None
The fastest flight from Casper to Portland, Maine takes 16h 15m
There are no direct flights from Casper to Portland, Maine. There are no popular flight routes from Casper to Portland, Maine.
Search flight deals

Frequently asked questions about flying from Casper to Portland, Maine

  • How far is Casper Natrona County to Portland by plane?

    A flight from Casper Natrona County to Portland will travel around 1800.3 mi. By plane, this route typically takes 16h 15m.

  • When did momondo last update prices for flights from Casper Natrona County Airport to Portland Airport?

    Prices for flights from Casper Natrona County Airport to Portland Airport are updated daily.

  • How old do you have to be to fly from Casper Natrona County Airport to Portland Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Casper Natrona County Airport to Portland Airport.

  • What documentation or ID do you need to fly to Portland Airport?

    The required travel and health documents for your Portland Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Portland Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
North Conway
Boothbay Harbor
Jackson
Lewiston
Brunswick
Conway
Freeport
Bartlett
Auburn
Gorham
Windham
Bath
Intervale
Oxford
Falmouth
Georgetown
Tamworth

Why use momondo?

Why should I use momondo to find a flight deal from Casper to Portland?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Portland from Casper.

Can I find flights from Casper to Portland with flexible booking policies on momondo?

momondo does allow users to show only those flights to Portland from Casper which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Casper to Portland?

Once you have performed a search for Casper to Portland flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Casper to Portland right now. Can momondo alert me if prices change?

Price alerts on flights to Portland from Casper are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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