$318+ Cheap flights from Casper to San Diego (CPR - SAN)
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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
CPR — SAN
Jan 11 — Jan 181
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Casper to San Diego with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Casper to San Diego
Best flights from Casper to San DiegoDiscover carefully curated flight deals from Casper to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 12, 2025.
Discover carefully curated flight deals from Casper to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 12, 2025.
This United Airlines deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/281:16 pmCPR - SAN
1 stop5h 12mUnited Airlines
Sat 1/3111:10 amSAN - CPR
1 stop4h 44mUnited Airlines
Deal found 12/9![United Airlines logo]()
$318
This United Airlines deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/23:15 pmCPR - SAN
1 stop6h 36mUnited Airlines
Thu 3/511:28 amSAN - CPR
1 stop6h 47mUnited Airlines
Deal found 12/10![United Airlines logo]()
$530
Find flight deals from Casper to San Diego
Discover tips and strategies to find the most affordable flight options for your journey from Casper (CPR) to San Diego (SAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 12, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $318 (United Airlines) |
Popular in | December |
Cheapest in | May |
Average price | $708 |
Cheapflights Fare Finder
Customize your flight search to find flights from Casper to San Diego 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, Cheapflights users made 2,558,603 searches. Data last updated December 12, 2025.
Use the filters below to find and compare flights from Casper to San Diego that are best for you.
Fly from
Casper
Fly to
San Diego
Route
Depart
Return
Price
CasperSan Diego
CPR - SAN
CPRSAN
Casper Natrona County
Wed 1/28
1:16 pm-5:28 pm
1 stop5h 12m
San Diego
Sat 1/31
11:10 am-4:54 pm
1 stop4h 44m
$318
CasperSan Diego
CPR - SAN
CPRSAN
Casper Natrona County
Mon 3/2
3:15 pm-8:51 pm
1 stop6h 36m
San Diego
Thu 3/5
11:28 am-7:15 pm
1 stop6h 47m
$530
Compare providers for flights from Casper to San Diego
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Casper to San Diego in December.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Casper-San Diego flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Casper-San Diego flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Casper-San Diego flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Casper-San Diego flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Casper-San Diego flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Casper to San Diego
Have a flexible travel schedule? Discover the best time to fly to San Diego from Casper 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 San Diego
Get insights into the airlines that provide service to San Diego. 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 San Diego. Reviews last updated December 12, 2025.
Read reviews from past customers who have flown United Airlines from Casper to San Diego. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.1
Food
6.6
Comfort
7.3
Entertainment
7.1
Boarding
7.7
Overall
7.4
Reviews
1 / 20
10.0
ExcellentAnonymous,Sep 2025
FRA - SFO
Crew
8.1
Food
6.6
Comfort
7.3
Entertainment
7.1
Boarding
7.7
Overall
7.4
Reviews
1 / 20
10.0
ExcellentAnonymous,Sep 2025
FRA - SFO
Related info for your journey
Find useful and relevant information for your journey from Casper to San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near San Diego?
Book flights to San Diego if you plan to visit one of these locationsEl Cajon
Chula Vista
Coronado
La Mesa
Poway
Lemon Grove
Julian
National City
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for Casper to San Diego
See prices for flight routes from nearby airports that may be better suited for you.
Top airline flying from Casper to San Diego
Discover the top airline that operate flights from Casper to San Diego. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$255 | Average$418 | FlexibilityNo cancel fee | On-time69% |