A golf course with a pond, green fields, and distant mountains.

$268 Cheap Flights from Portland (PDX) to Casper (CPR)

View $268 flight on Thu, Sep 17, 2026Opens in a new window

Popular airlines from Portland International Airport (PDX) to Casper, WY (CPR-Natrona County Intl.)

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 30% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Portland to Casper (PDX-CPR)

Prices were available within the past 7 days and start at $268 for one-way flights and $308 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Oct 15 - Thu, Nov 5
PDX
Portland
CPR
Casper
$308 Roundtrip, found 3 hours ago
$308
Roundtrip
found 3 hours ago
Select United flight, departing Thu, Oct 15 from Portland to Casper, returning Thu, Nov 5, priced at $308 found 3 hours ago
United
Sun, Sep 13 - Sat, Sep 19
PDX
Portland
CPR
Casper
$314 Roundtrip, found 7 hours ago
$314
Roundtrip
found 7 hours ago
Select United flight, departing Sun, Sep 13 from Portland to Casper, returning Sat, Sep 19, priced at $314 found 7 hours ago
United
Tue, Aug 18 - Tue, Aug 25
PDX
Portland
CPR
Casper
$323 Roundtrip, found 1 day ago
$323
Roundtrip
found 1 day ago
Select United flight, departing Tue, Aug 18 from Portland to Casper, returning Tue, Aug 25, priced at $323 found 1 day ago
United
Fri, Sep 18 - Tue, Sep 22
PDX
Portland
CPR
Casper
$325 Roundtrip, found 5 days ago
$325
Roundtrip
found 5 days ago
Select United flight, departing Fri, Sep 18 from Portland to Casper, returning Tue, Sep 22, priced at $325 found 5 days ago
United
Sun, Nov 8 - Sat, Nov 14
PDX
Portland
CPR
Casper
$328 Roundtrip, found 5 days ago
$328
Roundtrip
found 5 days ago
Select United flight, departing Sun, Nov 8 from Portland to Casper, returning Sat, Nov 14, priced at $328 found 5 days ago
United
Thu, Aug 20 - Wed, Aug 26
PDX
Portland
CPR
Casper
$328 Roundtrip, found 6 days ago
$328
Roundtrip
found 6 days ago
Select United flight, departing Thu, Aug 20 from Portland to Casper, returning Wed, Aug 26, priced at $328 found 6 days ago
United
Wed, Nov 11 - Wed, Nov 18
PDX
Portland
CPR
Casper
$332 Roundtrip, found 6 days ago
$332
Roundtrip
found 6 days ago
Select United flight, departing Wed, Nov 11 from Portland to Casper, returning Wed, Nov 18, priced at $332 found 6 days ago
United
Thu, Aug 20 - Wed, Aug 26
PDX
Portland
CPR
Casper
$334 Roundtrip, found 6 days ago
$334
Roundtrip
found 6 days ago
Select United flight, departing Thu, Aug 20 from Portland to Casper, returning Wed, Aug 26, priced at $334 found 6 days ago
United
Fri, Aug 21 - Fri, Aug 28
PDX
Portland
CPR
Casper
$334 Roundtrip, found 6 days ago
$334
Roundtrip
found 6 days ago
Select United flight, departing Fri, Aug 21 from Portland to Casper, returning Fri, Aug 28, priced at $334 found 6 days ago
United
Wed, Nov 11 - Wed, Nov 18
PDX
Portland
CPR
Casper
$335 Roundtrip, found 6 days ago
$335
Roundtrip
found 6 days ago
Select United flight, departing Wed, Nov 11 from Portland to Casper, returning Wed, Nov 18, priced at $335 found 6 days ago

Alternative airports near Casper

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Natrona County Intl. CPR. Cheapest and Closest option available. Average driving time to city center is 12 minutes. Flights from $338
CPR
Natrona County Intl.
CheapestClosest
Average driving time to city center12 min
Flights from $338

Find the cheapest month to fly from Portland (PDX) to Casper (CPR)

February is typically the cheapest month to fly

From $238 - $337 per traveler.

What you need to know for your flight from Portland Intl. to Natrona County Intl.

Portland (PDX) to Casper (CPR) at a glance

Travel from Portland (PDX) to Casper (CPR) with a full-service airline on this domestic short-haul route. Discover the itinerary that suits your schedule as you visit Casper's renowned attractions and neighborhoods. Check out essential information for flights from Portland International Airport to Natrona County International Airport, including options for cheap Portland to Casper flights and competitive flight prices.

  • Fastest flight duration: around 3h 45m in-flight, plus roughly 1h 15m layover with one stop
  • Route distance: roughly 800 miles (1,290 km)
  • Flights per week: around 8 departures on average
  • Typical fares (one-way): economy tickets often range from $120–$445, depending on seasonality and how far ahead you book

Flights from Portland International Airport (PDX) to Natrona County International Airport (CPR)

Based on the latest traveler bookings, here are the top airlines favored for flights from Portland to Casper, primarily selected for their one-stop services. Many flights feature a layover at Denver International Airport (DEN), which typically lasts about 1 hour and 15 minutes, allowing you to combine factors like price, total travel time, and cabin class to create the ideal itinerary.

  • United: As a comprehensive airline providing convenient one-stop options, United handles nearly all flights on this route. One-way ticket prices generally fall between $120 and $445. The in-flight duration is approximately 3 hours and 45 minutes, leading to a total travel time of around 5 hours, including layover.

Best time to fly from Portland (PDX) to Casper (CPR)

The most popular months for travelers flying from Portland to Casper are January, April, and May, when peak temperatures in Casper reach up to 52°F in May. If you prefer quieter travel, consider August, the least busy time to visit with temperatures around 71.6°F and typically the lowest average one-way fare (around $176). Flight availability peaks in July, with approximately 9 flights per week, making it easier to find convenient departure times. March, June, October, and November have the fewest flights, with approximately 7 flights per week.

  • Cheapest time to fly: August usually offers good deals with average one-way fare around $176, roughly 28% cheaper than the yearly average.
  • Another budget-friendly time to fly: February typically offers an average one-way fare of around $196.
  • Most flight options: July has the highest number of flights from Portland to Casper, with approximately 9 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January19.6°F (-6.9°C)Moderately High8$227
February20.1°F (-6.6°C)Moderately Low8$196
March32.7°F (0.4°C)Moderately Low7$304
April40.3°F (4.6°C)Moderately High8$293
May52.0°F (11.1°C)Moderately High8$246
June65.3°F (18.5°C)Average7$213
July73.9°F (23.3°C)Average9$282
August71.6°F (22.0°C)Moderately Low8$176
September62.8°F (17.1°C)Average8$223
October45.0°F (7.2°C)Average7$200
November32.7°F (0.4°C)Average7$309
December21.2°F (-6.0°C)Average8$268

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

How to find the best prices for flights from Portland (PDX) to Casper (CPR)

Getting some of the best deals on flights from Portland to Casper is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are typically found when booking 2-8 weeks in advance, which aligns with the booking habits of most travelers. Afternoon departures (12pm-6pm) generally offer lower prices, while morning flights (5am-12pm) are the most popular. Additionally, flying on Fridays tends to provide both cheaper rates and increased travel popularity.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.* Find Casper hotel and flight deals.
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Natrona County International Airport from Portland International Airport

Casper welcomes travelers from Portland with a range of transport options based on price, convenience, and proximity. Here's how to reach Casper efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Casper, with options including free hotel shuttles and private rides, which can be arranged in advance with your hotel.
  • Car rental: Renting a car from Natrona County International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Natrona County International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Natrona County International Airport, Casper Seaport, a seaport, is located about 0.4 miles away by car, providing convenient access for travelers heading to the water.

Frequently asked questions

How much does a flight from Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.) cost?
You can find cheap one-way flights from $268 and cheap return flights from $308 Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.) with Expedia. One-way flights typically cost between $268 and $730, and return flights often range between $381 and $1410. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.)?
February is the cheapest month to fly from Portland (PDX) to Casper (CPR), with average round-trip fares around $308. This fare is about 33% lower than the average price throughout the year, as February often has less travel activity. Other cheap months to fly from Portland to Casper include April and September.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.)?
Enter PDX to CPR and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.)?
United is one of the cheapest airlines offering connecting flights from Portland, OR (PDX) to Casper, WY (CPR), with round-trip tickets starting from around $237.97 with a layover in San Francisco Intl. (SFO). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.)?
To find a cheap flight from Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.)?
For flights from Portland (PDX) to Casper (CPR), February and April are the best months to travel. You can expect return flights to average around $308, which is quite economical. February is often less busy, while April brings springtime vibes, making it a lovely time to visit Wyoming.*Prices based on flights available on Expedia in the last year.
What is the earliest flight from Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from PDX to CPR. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.)?
Flights from PDX to CPR with one stop typically take around 5 hours, covering approximately 818 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.)?
Select the "Business class" and "First class" filters when looking for PDX to CPR flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.) flight with Expedia?
It's easy to earn miles on a Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Casper from Portland Intl. (PDX)?
From Portland Intl. (PDX), you can fly into Natrona County Intl. (CPR) to reach Casper. Some flights may connect through major hubs like Salt Lake City Intl. (SLC), Los Angeles Intl. (LAX), Minneapolis - St. Paul Intl. (MSP) before reaching Casper. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.) at the last minute?
Typically, booking a last minute flight from Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.) flight and hotel package?
Securing a Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.)?
If you booked your Portland, OR (PDX-Portland Intl.) to Casper, WY (CPR-Natrona County Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Portland Intl.
Destination airport
Natrona County Intl.
Airlines serving
United
Roundtrip price
$308
Distance
817 mi

Book with confidence

Portland to Casper Flights

The cheapest times to fly from Portland to Casper

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Portland to Casper are during the month of October. You can find some of the cheapest flights from Portland to Casper with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Portland to Casper

Sunday is one of the best days to book for cheap flights from Portland to Casper: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Portland to Casper

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Portland to Casper in 2026. You can also book with separate airlines for your outbound and return journeys, from $268 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Portland to Casper flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Portland to Casper airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Portland to Casper Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

Explore a world of travel with Expedia