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Cheap flights from Portland to Casper from $273

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Casper departing on 4/15. 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

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Find the cheapest flights from Portland to Casper

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
4:15 pm - 10:10 pm
PDX
-
CPR
4h 55m
1 stop
United Airlines Logo
6:10 pm - 10:54 pm
CPR
-
PDX
5h 44m
1 stop
$378United Airlines
Fri, May 1 - Mon, May 4
United Airlines Logo
4:15 pm - 10:07 pm
PDX
-
CPR
4h 52m
1 stop
United Airlines Logo
5:25 am - 1:09 pm
CPR
-
PDX
8h 44m
1 stop
$398United Airlines
Tue, Apr 21 - Sat, Apr 25
United Airlines Logo
5:00 am - 10:48 am
PDX
-
CPR
4h 48m
1 stop
United Airlines Logo
5:25 am - 9:38 am
CPR
-
PDX
5h 13m
1 stop
$399United Airlines
Fri, May 1 - Mon, May 4
United Airlines Logo
8:40 am - 6:59 pm
PDX
-
CPR
9h 19m
1 stop
United Airlines Logo
5:25 am - 2:31 pm
CPR
-
PDX
10h 06m
2 stops
$404United Airlines
Tue, Apr 21 - Sat, Apr 25
United Airlines Logo
5:00 am - 12:42 pm
PDX
-
CPR
6h 42m
1 stop
United Airlines Logo
6:05 pm - 11:03 pm
CPR
-
PDX
5h 58m
1 stop
$433United Airlines
Wed, Jun 10 - Wed, Jul 1
United Airlines Logo
7:15 am - 6:59 pm
PDX
-
CPR
10h 44m
2 stops
United Airlines Logo
7:05 am - 6:08 pm
CPR
-
PDX
12h 03m
2 stops
$444United Airlines
Tue, Apr 21 - Sat, Apr 25
United Airlines Logo
4:15 pm - 10:10 pm
PDX
-
CPR
4h 55m
1 stop
United Airlines Logo
3:14 pm - 12:59 am
CPR
-
PDX
10h 45m
2 stops
$453United Airlines
Fri, May 1 - Mon, May 4
United Airlines Logo
12:50 pm - 7:15 pm
PDX
-
CPR
5h 25m
1 stop
United Airlines Logo
9:26 am - 3:13 pm
CPR
-
PDX
6h 47m
1 stop
$455United Airlines
Fri, May 29 - Sun, May 31
United Airlines Logo
4:15 pm - 10:10 pm
PDX
-
CPR
4h 55m
1 stop
United Airlines Logo
3:14 pm - 12:59 am
CPR
-
PDX
10h 45m
2 stops
$463United Airlines
Fri, May 1 - Mon, May 4
United Airlines Logo
4:15 pm - 10:10 pm
PDX
-
CPR
4h 55m
1 stop
United Airlines Logo
6:10 pm - 10:54 pm
CPR
-
PDX
5h 44m
1 stop
$479United Airlines
Fri, May 1 - Sun, May 3

United Airlines flights from Portland to Casper

Our best United Airlines deals on Portland to Casper flight tickets
United Airlines
May 1
PDX4:15 pmPortland
4h 55m
1 stop
CPR10:10 pmCasper Natrona County
May 4
CPR6:10 pmCasper Natrona County
5h 44m
1 stop
PDX10:54 pmPortland
$378
United Airlines
Apr 21
PDX4:15 pmPortland
4h 52m
1 stop
CPR10:07 pmCasper Natrona County
Apr 25
CPR5:25 amCasper Natrona County
8h 44m
1 stop
PDX1:09 pmPortland
$398
United Airlines
May 1
PDX5:00 amPortland
4h 48m
1 stop
CPR10:48 amCasper Natrona County
May 4
CPR5:25 amCasper Natrona County
5h 13m
1 stop
PDX9:38 amPortland
$399

momondo 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, momondo users made 832,500 searches. Data last updated March 28, 2026.
Use the filters below to find and compare flights from Portland to Casper that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandCasper

PDX - CPR

PDXCPR

Portland

Fri 5/1

4:15 pm-10:10 pm

1 stop4h 55m

Casper Natrona County

Mon 5/4

6:10 pm-10:54 pm

1 stop5h 44m

$378

PortlandCasper

PDX - CPR

PDXCPR

Portland

Tue 4/21

4:15 pm-10:07 pm

1 stop4h 52m

Casper Natrona County

Sat 4/25

5:25 am-1:09 pm

1 stop8h 44m

$398
Quickest round-trip

PortlandCasper

PDX - CPR

PDXCPR

Portland

Fri 5/1

5:00 am-10:48 am

1 stop4h 48m

Casper Natrona County

Mon 5/4

5:25 am-9:38 am

1 stop5h 13m

$399

PortlandCasper

PDX - CPR

PDXCPR

Portland

Tue 4/21

8:40 am-6:59 pm

1 stop9h 19m

Casper Natrona County

Sat 4/25

5:25 am-2:31 pm

2 stops10h 06m

$404

PortlandCasper

PDX - CPR

PDXCPR

Portland

Wed 6/10

5:00 am-12:42 pm

1 stop6h 42m

Casper Natrona County

Wed 7/1

6:05 pm-11:03 pm

1 stop5h 58m

$433

PortlandCasper

PDX - CPR

PDXCPR

Portland

Tue 4/21

7:15 am-6:59 pm

2 stops10h 44m

Casper Natrona County

Sat 4/25

7:05 am-6:08 pm

2 stops12h 03m

$444

PortlandCasper

PDX - CPR

PDXCPR

Portland

Fri 5/1

4:15 pm-10:10 pm

1 stop4h 55m

Casper Natrona County

Mon 5/4

3:14 pm-12:59 am

2 stops10h 45m

$453

PortlandCasper

PDX - CPR

PDXCPR

Portland

Fri 5/29

12:50 pm-7:15 pm

1 stop5h 25m

Casper Natrona County

Sun 5/31

9:26 am-3:13 pm

1 stop6h 47m

$455

PortlandCasper

PDX - CPR

PDXCPR

Portland

Fri 5/1

4:15 pm-10:10 pm

1 stop4h 55m

Casper Natrona County

Mon 5/4

3:14 pm-12:59 am

2 stops10h 45m

$463

PortlandCasper

PDX - CPR

PDXCPR

Portland

Fri 5/1

4:15 pm-10:10 pm

1 stop4h 55m

Casper Natrona County

Sun 5/3

6:10 pm-10:54 pm

1 stop5h 44m

$479

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Portland to Casper

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

What is the typical price of a round-trip flight between Portland and Casper?

What is the cheapest month to fly to Casper?

In general, February is the cheapest month to fly from Portland to Casper. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $283. If you aren’t able to travel during the month of February, then book flights to Casper from Portland during April instead. Flights to Casper in April, while not as cheap as those in February, still average around $297.

When to book flights from Portland to Casper

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

Cheap Portland to Casper (PDX to CPR) flight deals and tips

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

Fastest flight time

4h 44m

Direct flights

None
The fastest flight from Portland to Casper takes 4h 44m
There are no direct flights from Portland to Casper. There are no popular flight routes from Portland to Casper.
Search flight deals

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

    The straight-line distance from Portland to Casper Natrona County is 828.7 mi. By plane, this route typically takes 4h 44m.

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

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

  • How many operators does momondo search for flights from Portland Airport to Casper Natrona County Airport?

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to Casper Natrona County Airport.

  • What documentation or ID do you need to fly to Casper Natrona County Airport?

    The travel and health documents you'll need for your trip to Casper Natrona County Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Casper Natrona County Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Portland to Casper?

Best airlines flying from Portland to Casper

Compare and see reviews for airlines that fly from Portland to Casper with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $238Free CancellationRating
7.4
9,499 reviews
Search United Airlines flights

Traveling to a place near Casper?

Book flights to Casper if you plan to visit one of these locations
Rawlins
Evansville
Douglas

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Portland to Casper. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Portland to Casper flights to just show those with flexible booking policies.

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

Once all potential Portland to Casper flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes momondo offers price alerts on flights to Casper from Portland. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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