$410+ 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
Sep 25 — Oct 21
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
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Best
Last-minute
One-way
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 August 26, 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 August 26, 2026.
This American Airlines deal was found by Cheapflights users on 8/25. 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 12/122:32 pm -
1 stop6h 30m
Tue 12/157:41 am -
1 stop8h 36m
Deal found 8/25![American Airlines logo]()
$410
This American Airlines deal was found by Cheapflights users on 8/21. 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 9/52:47 pm -
1 stop6h 07m
Wed 9/911:15 am -
1 stop8h 31m
Deal found 8/21![American Airlines logo]()
$450
This American Airlines deal was found by Cheapflights users on 8/21. 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 11/122:29 pm -
1 stop6h 33m
Sat 11/1410:11 am -
1 stop6h 05m
Deal found 8/21![American Airlines logo]()
$474
This American Airlines deal was found by Cheapflights users on 8/25. 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.
Wed 9/22:47 pm -
1 stop6h 07m
Sat 9/59:48 am -
1 stop6h 18m
Deal found 8/25![American Airlines logo]()
$490
This American Airlines deal was found by Cheapflights users on 8/25. 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.
Wed 9/92:41 pm -
1 stop7h 20m
Sun 9/137:32 am -
1 stop8h 38m
Deal found 8/25![American Airlines logo]()
$520
This American Airlines deal was found by Cheapflights users on 8/25. 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.
Wed 9/22:47 pm -
1 stop6h 07m
Sun 9/612:06 pm -
1 stop7h 54m
Deal found 8/25![American Airlines logo]()
$560
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 August 26, 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 August 26, 2026.
This American Airlines deal was found by Cheapflights users on 8/24. 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.
Sat 12/122:32 pm -
1 stop6h 30m
Tue 12/157:41 am -
1 stop8h 36m
Deal found 8/24![American Airlines logo]()
$410
This American Airlines deal was found by Cheapflights users on 8/24. 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 11/116:50 pm -
1 stop7h 04m
Sat 11/1410:11 am -
1 stop8h 10m
Deal found 8/24![American Airlines logo]()
$410
This American Airlines deal was found by Cheapflights users on 8/21. 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 9/52:47 pm -
1 stop6h 07m
Wed 9/911:15 am -
1 stop8h 31m
Deal found 8/21![American Airlines logo]()
$450
This American Airlines deal was found by Cheapflights users on 8/21. 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 9/196:41 pm -
1 stop6h 44m
Sat 9/2610:04 am -
1 stop8h 52m
Deal found 8/21![American Airlines logo]()
$450
This American Airlines deal was found by Cheapflights users on 8/24. 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.
Tue 9/84:54 pm -
1 stop8h 53m
Sat 9/1212:08 pm -
1 stop7h 38m
Deal found 8/24![American Airlines logo]()
$490
Last-minute flights from Champaign to San DiegoDiscover last-minute flight deals from Champaign to San Diego. Data last updated August 26, 2026 and is based on user searches.
Discover last-minute flight deals from Champaign to San Diego. Data last updated August 26, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 8/25. 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.
Wed 9/22:47 pm -
1 stop6h 07m
Sat 9/59:48 am -
1 stop6h 18m
Deal found 8/25![American Airlines logo]()
$490
This American Airlines deal was found by Cheapflights users on 8/25. 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.
Wed 9/22:47 pm -
1 stop6h 07m
Sun 9/612:06 pm -
1 stop7h 54m
Deal found 8/25![American Airlines logo]()
$560
This American Airlines deal was found by Cheapflights users on 8/24. 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.
Thu 9/32:47 pm -
1 stop6h 09m
Sun 9/66:15 am -
1 stop8h 07m
Deal found 8/24![American Airlines logo]()
$630
This American Airlines deal was found by Cheapflights users on 8/21. 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 9/52:47 pm -
1 stop6h 07m
Wed 9/911:15 am -
1 stop8h 31m
Deal found 8/21![American Airlines logo]()
$450
This American Airlines deal was found by Cheapflights users on 8/25. 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.
Wed 9/92:41 pm -
1 stop7h 20m
Sun 9/137:32 am -
1 stop8h 38m
Deal found 8/25![American Airlines logo]()
$520
This American Airlines deal was found by Cheapflights users on 8/21. 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 9/197:16 am -
2 stops10h 06m
Sat 9/266:20 am -
2 stops12h 36m
Deal found 8/21![American Airlines logo]()
$514
One-way flights from Champaign to San DiegoSearch for one-way flight options from Champaign to San Diego. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.
Search for one-way flight options from Champaign to San Diego. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.
This American Airlines deal was found by Cheapflights users on 8/23. 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 9/82:47 pm -
1 stop7h 07m
Deal found 8/23![American Airlines logo]()
$438
This American Airlines deal was found by Cheapflights users on 8/22. 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 11/156:00 am -
1 stop8h 40m
Deal found 8/22![American Airlines logo]()
$463
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 August 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $410 (American Airlines) |
Popular in | December |
Cheapest in | May |
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 August 26, 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
2:32 pm-7:02 pm
1 stop6h 30m
San Diego
Tue 12/15
7:41 am-6:17 pm
1 stop8h 36m
$410
ChampaignSan Diego
CMI Champaign University-Willard - SAN San Diego
CMISAN
Champaign University-Willard
Wed 11/11
6:50 pm-11:54 pm
1 stop7h 04m
San Diego
Sat 11/14
10:11 am-8:21 pm
1 stop8h 10m
$410
Quickest round-trip
ChampaignSan Diego
CMI Champaign University-Willard - SAN San Diego
CMISAN
Champaign University-Willard
Sat 9/5
2:47 pm-6:54 pm
1 stop6h 07m
San Diego
Wed 9/9
11:15 am-9:46 pm
1 stop8h 31m
$450
ChampaignSan Diego
CMI Champaign University-Willard - SAN San Diego
CMISAN
Champaign University-Willard
Sat 9/19
6:41 pm-11:25 pm
1 stop6h 44m
San Diego
Sat 9/26
10:04 am-8:56 pm
1 stop8h 52m
$450
ChampaignSan Diego
CMI Champaign University-Willard - SAN San Diego
CMISAN
Champaign University-Willard
Tue 9/8
4:54 pm-11:47 pm
1 stop8h 53m
San Diego
Sat 9/12
12:08 pm-9:46 pm
1 stop7h 38m
$490
Cheapest one-way
ChampaignSan Diego
CMI Champaign University-Willard - SAN San Diego
CMISAN
Champaign University-Willard
Tue 11/10
2:32 pm-8:35 pm
1 stop8h 03m
$438
Quickest one-way
ChampaignSan Diego
CMI Champaign University-Willard - SAN San Diego
CMISAN
Champaign University-Willard
Tue 9/15
2:41 pm-6:51 pm
1 stop6h 10m
$438
ChampaignSan Diego
CMI Champaign University-Willard - SAN San Diego
CMISAN
Champaign University-Willard
Tue 9/8
11:41 am-6:18 pm
2 stops8h 37m
$444
ChampaignSan Diego
CMI Champaign University-Willard - SAN San Diego
CMISAN
Champaign University-Willard
Tue 12/8
6:08 am-3:39 pm
2 stops11h 31m
$444
ChampaignSan Diego
CMI Champaign University-Willard - SAN San Diego
CMISAN
Champaign University-Willard
Sun 11/15
6:00 am-12:40 pm
1 stop8h 40m
$463
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 August.
| 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 August 26, 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.
Entertainment
6.8
Comfort
7.2
Overall
7.1
Crew
7.9
Food
6.4
Boarding
7.5
Reviews
1 / 20
2.0
MediocreAnonymous,Mar 2026
MIA - SFO
Entertainment
6.8
Comfort
7.2
Overall
7.1
Crew
7.9
Food
6.4
Boarding
7.5
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
National City
Chula Vista
Coronado
Poway
San Ysidro
La Mesa
Santee
Julian
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 August 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$379 | Average$537 | FlexibilityNo cancel fee | On-time71% |