$338+ 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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
CPR — SAN
Oct 14 — Oct 211
Round-trip
1 adult, Economy
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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
Cheapest
Best
Last-minute
Cheapest flights from Casper to San DiegoExplore the most affordable flight options available from Casper to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 14, 2026.
Explore the most affordable flight options available from Casper to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 14, 2026.
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/76:00 pm -
1 stop5h 27m
Thu 10/157:00 am -
1 stop4h 39m
Deal found 9/13![United Airlines logo]()
$338
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Sat 10/3111:24 am -
1 stop4h 31m
Tue 11/311:21 am -
1 stop6h 32m
Deal found 9/10![United Airlines logo]()
$398
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Fri 9/185:15 am -
1 stop4h 50m
Sun 9/206:30 am -
1 stop5h 05m
Deal found 9/10![United Airlines logo]()
$538
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 September 14, 2026.
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 September 14, 2026.
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/71:20 pm -
2 stops7h 48m
Thu 10/154:11 pm -
1 stop4h 53m
Deal found 9/13![United Airlines logo]()
$372
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Sat 10/3111:24 am -
1 stop4h 31m
Tue 11/311:21 am -
1 stop6h 32m
Deal found 9/9![United Airlines logo]()
$398
Last-minute flights from Casper to San DiegoDiscover last-minute flight deals from Casper to San Diego. Data last updated September 14, 2026 and is based on user searches.
Discover last-minute flight deals from Casper to San Diego. Data last updated September 14, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Fri 9/185:15 am -
1 stop4h 50m
Sun 9/206:30 am -
1 stop5h 05m
Deal found 9/10![United Airlines logo]()
$538
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/76:00 pm -
1 stop5h 27m
Thu 10/157:00 am -
1 stop4h 39m
Deal found 9/13![United Airlines logo]()
$338
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Sat 10/3111:24 am -
1 stop4h 31m
Tue 11/311:21 am -
1 stop6h 32m
Deal found 9/10![United Airlines logo]()
$398
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 September 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $338 (United Airlines) |
Popular in | December |
Cheapest in | January |
Average price | $424 |
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 7,457,451 searches. Data last updated September 14, 2026.
Use the filters below to find and compare flights from Casper to San Diego that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
CasperSan Diego
CPR Casper Natrona County - SAN San Diego
CPRSAN
Casper Natrona County
Wed 10/7
1:20 pm-8:08 pm
2 stops7h 48m
San Diego
Thu 10/15
4:11 pm-10:04 pm
1 stop4h 53m
$372
Quickest round-trip
CasperSan Diego
CPR Casper Natrona County - SAN San Diego
CPRSAN
Casper Natrona County
Sat 10/31
11:24 am-2:55 pm
1 stop4h 31m
San Diego
Tue 11/3
11:21 am-6:53 pm
1 stop6h 32m
$398
Sorted by cheapest first
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Casper-San Diego flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Casper-San Diego flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.
CPR-SAN
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 September 14, 2026.
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.
Food
6.7
Overall
7.4
Boarding
7.7
Crew
8.1
Comfort
7.3
Entertainment
7.1
Reviews
1 / 20
4.0
OkaySimon,Jun 2024
LAS - LAX
Food
6.7
Overall
7.4
Boarding
7.7
Crew
8.1
Comfort
7.3
Entertainment
7.1
Reviews
1 / 20
4.0
OkaySimon,Jun 2024
LAS - LAX
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
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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 7,457,451 searches. Data last updated September 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$268 | Average$403 | FlexibilityNo cancel fee | On-time69% |