$224 Cheap Flights from Casper (CPR) to San Diego (SAN)

View $224 flight on Mon, Jun 9, 2025Opens in a new window

Popular airlines from Casper, WY (CPR-Natrona County Intl.) to San Diego Intl. Airport (SAN)

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Find available prices by choosing your travel dates.

Cheap Flights from Casper to San Diego (CPR-SAN)

Prices were available within the past 7 days and start at $224 for one-way flights and $248 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Jun 18 - Tue, Jun 24
CPR
Casper
SAN
San Diego
$248 Roundtrip, found 2 days ago
$248
Roundtrip
found 2 days ago
Select United flight, departing Wed, Jun 18 from Casper to San Diego, returning Tue, Jun 24, priced at $248 found 2 days ago
United
Fri, Oct 17 - Tue, Oct 21
CPR
Casper
SAN
San Diego
$254 Roundtrip, found 5 days ago
$254
Roundtrip
found 5 days ago
Select United flight, departing Fri, Oct 17 from Casper to San Diego, returning Tue, Oct 21, priced at $254 found 5 days ago
United
Sat, May 3 - Sat, May 10
CPR
Casper
SAN
San Diego
$263 Roundtrip, found 4 days ago
$263
Roundtrip
found 4 days ago
Select United flight, departing Sat, May 3 from Casper to San Diego, returning Sat, May 10, priced at $263 found 4 days ago
United
Sat, May 3 - Sat, May 10
CPR
Casper
SAN
San Diego
$269 Roundtrip, found 4 days ago
$269
Roundtrip
found 4 days ago
Select United flight, departing Sat, May 3 from Casper to San Diego, returning Sat, May 10, priced at $269 found 4 days ago
United
Sat, May 24 - Fri, May 30
CPR
Casper
SAN
San Diego
$280 Roundtrip, found 6 days ago
$280
Roundtrip
found 6 days ago
Select United flight, departing Sat, May 24 from Casper to San Diego, returning Fri, May 30, priced at $280 found 6 days ago
United
Thu, Aug 14 - Sun, Aug 17
CPR
Casper
SAN
San Diego
$281 Roundtrip, found 12 hours ago
$281
Roundtrip
found 12 hours ago
Select United flight, departing Thu, Aug 14 from Casper to San Diego, returning Sun, Aug 17, priced at $281 found 12 hours ago
United
Sat, May 24 - Fri, May 30
CPR
Casper
SAN
San Diego
$285 Roundtrip, found 6 days ago
$285
Roundtrip
found 6 days ago
Select United flight, departing Sat, May 24 from Casper to San Diego, returning Fri, May 30, priced at $285 found 6 days ago
United
Sat, Jun 28 - Sat, Jul 12
CPR
Casper
SAN
San Diego
$286 Roundtrip, found 8 hours ago
$286
Roundtrip
found 8 hours ago
Select United flight, departing Sat, Jun 28 from Casper to San Diego, returning Sat, Jul 12, priced at $286 found 8 hours ago
United
Sat, Jun 28 - Sat, Jul 12
CPR
Casper
SAN
San Diego
$286 Roundtrip, found 8 hours ago
$286
Roundtrip
found 8 hours ago
Select United flight, departing Sat, Jun 28 from Casper to San Diego, returning Sat, Jul 12, priced at $286 found 8 hours ago
United
Thu, Aug 14 - Sun, Aug 17
CPR
Casper
SAN
San Diego
$291 Roundtrip, found 12 hours ago
$291
Roundtrip
found 12 hours ago
Select United flight, departing Thu, Aug 14 from Casper to San Diego, returning Sun, Aug 17, priced at $291 found 12 hours ago
Flights from Casper (CPR) to San Diego (SAN)
Origin airport
Natrona County Intl.
Destination airport
San Diego Intl.
Airlines serving
United
Roundtrip price
$248
Distance
912 mi

Casper to San Diego Flights

The cheapest times to fly from Casper to San Diego

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 Casper to San Diego are during the month of June. You can find some of the cheapest flights from Casper to San Diego with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Casper to San Diego

Sunday is one of the best days to book for cheap flights from Casper to San Diego: 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 Casper to San Diego

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 Casper to San Diego in 2025. You can also book with separate airlines for your outbound and return journeys, from $224 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 Casper to San Diego 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 Casper to San Diego 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.

Frequently asked questions

How much does a flight from Natrona County Intl. Airport (CPR) to San Diego Intl. Airport (SAN) cost?
Discover the latest flight deals from CPR to SAN by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from CPR to SAN?
The cheapest flights from CPR to SAN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from CPR to SAN?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from CPR to SAN. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Natrona County Intl. Airport (CPR) to San Diego Intl. Airport (SAN)?
There aren’t any daily nonstop flights available from Natrona County Intl. Airport (CPR) to San Diego Intl. Airport (SAN). But you can book flights with layovers. Filter your search results on Expedia to include one or more stops, and you’ll be on your way in no time.
What day of the week has the most flights from CPR to SAN?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can change depending on various factors, such as the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Natrona County Intl. Airport (CPR) to San Diego Intl. Airport (SAN)?
Select a flight from Natrona County Intl. Airport (CPR) to San Diego Intl. Airport (SAN) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Departures later than this have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Natrona County Intl. Airport (CPR) to San Diego Intl. Airport (SAN) last-minute?
Booking your ticket from CPR to SAN right before your trip is generally more expensive. However, if you’re flexible with your travel dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book a CPR to SAN flight and hotel package?
Compared with arranging hotels and flights separately, booking a CPR to SAN flight and hotel package with Expedia could lead to significant savings. Better still, having it all in one place takes the hassle out of planning your trip. Just secure your flights and choose from our wide range of hotels, then personalize your trip with other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Natrona County Intl. Airport (CPR) to San Diego Intl. Airport (SAN)?
If you booked your CPR to SAN 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 purchased, 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 for more details.

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*Available to One Key members.