$430+ Cheap flights from Champaign to San Diego (CMI - 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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
CMI — SAN
Oct 28 — Nov 41
Round-trip
1 adult, Economy
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Find cheap flights from Champaign 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 Champaign to San Diego
Cheapest
Best
Last-minute
Cheapest flights from Champaign to San DiegoExplore the most affordable flight options available from Champaign to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 28, 2026.
Explore the most affordable flight options available from Champaign to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 28, 2026.
This American Airlines deal was found by Cheapflights users on 9/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/125:59 am -
1 stop8h 44m
Tue 12/1510:14 am -
1 stop6h 16m
Deal found 9/28![American Airlines logo]()
$430
This American Airlines deal was found by Cheapflights users on 9/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/86:05 am -
1 stop6h 51m
Wed 11/1812:28 pm -
1 stop7h 34m
Deal found 9/28![American Airlines logo]()
$494
This American Airlines deal was found by Cheapflights users on 9/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/104:05 pm -
1 stop9h 14m
Wed 10/149:57 am -
2 stops10h 06m
Deal found 9/25![American Airlines logo]()
$541
This American Airlines deal was found by Cheapflights users on 9/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:37 pm -
1 stop6h 25m
Wed 10/149:57 am -
2 stops8h 28m
Deal found 9/24![American Airlines logo]()
$566
This American Airlines deal was found by Cheapflights users on 9/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/132:37 pm -
1 stop6h 25m
Sat 10/1710:06 am -
1 stop8h 19m
Deal found 9/27![American Airlines logo]()
$591
Best flights from Champaign to San DiegoDiscover carefully curated flight deals from Champaign to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 28, 2026.
Discover carefully curated flight deals from Champaign to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 28, 2026.
This American Airlines deal was found by Cheapflights users on 9/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/126:05 am -
1 stop8h 34m
Tue 12/1510:12 am -
1 stop8h 09m
Deal found 9/26![American Airlines logo]()
$430
This American Airlines deal was found by Cheapflights users on 9/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/86:05 am -
1 stop6h 51m
Wed 11/1812:28 pm -
1 stop7h 34m
Deal found 9/25![American Airlines logo]()
$494
This American Airlines deal was found by Cheapflights users on 9/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/104:05 pm -
1 stop9h 14m
Wed 10/149:57 am -
2 stops10h 06m
Deal found 9/25![American Airlines logo]()
$541
This American Airlines deal was found by Cheapflights users on 9/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/132:37 pm -
1 stop6h 25m
Sat 10/1710:06 am -
1 stop8h 19m
Deal found 9/27![American Airlines logo]()
$591
Last-minute flights from Champaign to San DiegoDiscover last-minute flight deals from Champaign to San Diego. Data last updated September 28, 2026 and is based on user searches.
Discover last-minute flight deals from Champaign to San Diego. Data last updated September 28, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 9/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/12:41 pm -
1 stop6h 10m
Mon 10/51:53 pm -
1 stop6h 10m
Deal found 9/28![American Airlines logo]()
$650
This American Airlines deal was found by Cheapflights users on 9/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:00 am -
2 stops11h 22m
Sun 10/46:20 am -
2 stops9h 50m
Deal found 9/26![American Airlines logo]()
$799
This American Airlines deal was found by Cheapflights users on 9/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:37 pm -
1 stop6h 25m
Wed 10/149:57 am -
2 stops8h 28m
Deal found 9/24![American Airlines logo]()
$566
This American Airlines deal was found by Cheapflights users on 9/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/912:38 pm -
1 stop8h 50m
Tue 10/137:53 am -
1 stop8h 12m
Deal found 9/24![American Airlines logo]()
$707
This American Airlines deal was found by Cheapflights users on 9/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/104:05 pm -
1 stop9h 14m
Wed 10/149:57 am -
2 stops10h 06m
Deal found 9/25![American Airlines logo]()
$541
This American Airlines deal was found by Cheapflights users on 9/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/132:37 pm -
1 stop6h 25m
Sat 10/1710:06 am -
1 stop8h 19m
Deal found 9/27![American Airlines logo]()
$591
Find flight deals from Champaign to San Diego
Discover tips and strategies to find the most affordable flight options for your journey from Champaign (CMI) 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 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $430 (American Airlines) |
Popular in | December |
Cheapest in | May |
Average price | $490 |
Cheapflights Fare Finder
Customize your flight search to find flights from Champaign 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 28, 2026.
Use the filters below to find and compare flights from Champaign to San Diego that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChampaignSan Diego
CMI Champaign University-Willard - SAN San Diego
CMISAN
Champaign University-Willard
Sat 12/12
6:05 am-12:39 pm
1 stop8h 34m
San Diego
Tue 12/15
10:12 am-8:21 pm
1 stop8h 09m
$430
Quickest round-trip
ChampaignSan Diego
CMI Champaign University-Willard - SAN San Diego
CMISAN
Champaign University-Willard
Sun 11/8
6:05 am-10:56 am
1 stop6h 51m
San Diego
Wed 11/18
12:28 pm-10:02 pm
1 stop7h 34m
$494
ChampaignSan Diego
CMI Champaign University-Willard - SAN San Diego
CMISAN
Champaign University-Willard
Sat 10/10
4:05 pm-11:19 pm
1 stop9h 14m
San Diego
Wed 10/14
9:57 am-10:03 pm
2 stops10h 06m
$541
ChampaignSan Diego
CMI Champaign University-Willard - SAN San Diego
CMISAN
Champaign University-Willard
Tue 10/13
2:37 pm-7:02 pm
1 stop6h 25m
San Diego
Sat 10/17
10:06 am-8:25 pm
1 stop8h 19m
$591
Sorted by cheapest first
Compare providers for flights from Champaign 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 Champaign to San Diego in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Champaign-San Diego flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Champaign-San Diego flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Champaign-San Diego flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Champaign-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 Champaign-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 Champaign to San Diego
Have a flexible travel schedule? Discover the best time to fly to San Diego from Champaign with our price prediction graph.
CMI-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 28, 2026.
See what other customers who have flown with American Airlines from Champaign to San Diego have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
7.4
Comfort
7.2
Entertainment
6.8
Crew
7.9
Overall
7.0
Food
6.4
Reviews
1 / 20
2.0
MediocreAnonymous,Mar 2026
MIA - SFO
Boarding
7.4
Comfort
7.2
Entertainment
6.8
Crew
7.9
Overall
7.0
Food
6.4
Reviews
1 / 20
2.0
MediocreAnonymous,Mar 2026
MIA - SFO
Related info for your journey
Find useful and relevant information for your journey from Champaign 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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Lemon Grove
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Champaign and San Diego flights
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Top airline flying from Champaign to San Diego
Discover the top airline that operate flights from Champaign 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 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$379 | Average$490 | FlexibilityNo cancel fee | On-time71% |