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Cheap flights from Champaign to San Diego (CMI - SAN) - Compare and Save

CMI — SAN
Jul 1 — Jul 81
Tue 7/1
Tue 7/8
1 adult, Economy
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Cheap 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 June 26, 2025.

Round-trip from

$490
(American Airlines)

Popular in

June

Cheapest in

February

Average price

$700
From Champaign University-Willard to San Diego
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Highest demand for flights based on searches. 12% potential increase in price ($62 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Champaign to San Diego

Cheapest flights from Champaign to San Diego
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 June 26, 2025.

This American Airlines deal was found by Cheapflights users on 6/23. 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 7/17:00 amCMI - SAN
1 stop7h 01mAmerican Airlines
Tue 7/86:15 amSAN - CMI
1 stop6h 06mAmerican Airlines
Deal found 6/23$450
This American Airlines deal was found by Cheapflights users on 6/24. 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 7/17:00 amCMI - SAN
2 stops10h 24mAmerican Airlines
Tue 7/86:15 amSAN - CMI
1 stop6h 06mAmerican Airlines
Deal found 6/24$456
This American Airlines deal was found by Cheapflights users on 6/24. 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 7/17:00 amCMI - SAN
1 stop7h 01mAmerican Airlines
Tue 7/86:15 amSAN - CMI
1 stop6h 06mAmerican Airlines
Deal found 6/24$486
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Mon 6/302:47 pmCMI - SAN
1 stop6h 33mAmerican Airlines
Mon 7/76:15 amSAN - CMI
1 stop6h 06mAmerican Airlines
Deal found 6/24$498
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Mon 6/302:47 pmCMI - SAN
2 stops9h 01mAmerican Airlines
Mon 7/76:15 amSAN - CMI
1 stop6h 06mAmerican Airlines
Deal found 6/24$504
This American Airlines deal was found by Cheapflights users on 6/22. 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.
Sat 8/233:46 pmCMI - SAN
1 stop8h 44mAmerican Airlines
Tue 8/266:15 amSAN - CMI
2 stops12h 27mAmerican Airlines
Deal found 6/22$510
This American Airlines deal was found by Cheapflights users on 6/22. 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.
Sat 8/2311:25 amCMI - SAN
2 stops10h 13mAmerican Airlines
Tue 8/266:15 amSAN - CMI
2 stops7h 59mAmerican Airlines
Deal found 6/22$515
This American Airlines deal was found by Cheapflights users on 6/23. 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.
Thu 7/35:54 amCMI - SAN
1 stop8h 16mAmerican Airlines
Sat 7/56:15 amSAN - CMI
1 stop6h 35mAmerican Airlines
Deal found 6/23$534
This American Airlines deal was found by Cheapflights users on 6/23. 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.
Thu 7/35:54 amCMI - SAN
2 stops7h 57mAmerican Airlines
Sat 7/510:40 amSAN - CMI
1 stop9h 05mAmerican Airlines
Deal found 6/23$540
This American Airlines deal was found by Cheapflights users on 6/23. 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.
Thu 7/35:54 amCMI - SAN
2 stops7h 57mAmerican Airlines
Sat 7/59:50 amSAN - CMI
2 stops8h 57mAmerican Airlines
Deal found 6/23$545
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Mon 6/303:28 pmCMI - SAN
2 stops8h 20mAmerican Airlines
Mon 7/79:50 amSAN - CMI
2 stops9h 55mAmerican Airlines
Deal found 6/24$566
This American Airlines deal was found by Cheapflights users on 6/23. 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 7/82:51 pmCMI - SAN
2 stops9h 04mAmerican Airlines
Sat 7/126:30 amSAN - CMI
2 stops13h 15mAmerican Airlines
Deal found 6/23$574

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 2,558,603 searches. Data last updated June 26, 2025.
Use the filters below to find and compare flights from Champaign to San Diego that are best for you.

Fly from

Champaign

Fly to

San Diego

Route

Depart

Return

Price

ChampaignSan Diego

CMI - SAN

CMISAN

Champaign University-Willard

Fri 7/25

2:51 pm-7:16 pm

1 stop6h 25m

San Diego

Fri 8/1

10:46 am-7:50 pm

1 stop7h 04m

$490

ChampaignSan Diego

CMI - SAN

CMISAN

Champaign University-Willard

Fri 7/25

3:20 pm-9:55 pm

2 stops8h 35m

San Diego

Fri 8/1

10:46 am-7:50 pm

1 stop7h 04m

$496

ChampaignSan Diego

CMI - SAN

CMISAN

Champaign University-Willard

Tue 7/8

3:20 pm-8:04 pm

1 stop6h 44m

San Diego

Sat 7/12

10:40 am-9:45 pm

1 stop9h 05m

$498

ChampaignSan Diego

CMI - SAN

CMISAN

Champaign University-Willard

Tue 7/8

3:20 pm-8:04 pm

1 stop6h 44m

San Diego

Sat 7/12

6:30 am-9:45 pm

2 stops13h 15m

$504

ChampaignSan Diego

CMI - SAN

CMISAN

Champaign University-Willard

Sat 8/23

3:46 pm-10:30 pm

1 stop8h 44m

San Diego

Tue 8/26

6:15 am-8:42 pm

2 stops12h 27m

$510

ChampaignSan Diego

CMI - SAN

CMISAN

Champaign University-Willard

Sat 8/23

11:25 am-7:38 pm

2 stops10h 13m

San Diego

Tue 8/26

6:15 am-4:14 pm

2 stops7h 59m

$515

ChampaignSan Diego

CMI - SAN

CMISAN

Champaign University-Willard

Fri 7/25

2:51 pm-9:55 pm

2 stops9h 04m

San Diego

Fri 8/1

6:30 am-7:50 pm

2 stops11h 20m

$534

ChampaignSan Diego

CMI - SAN

CMISAN

Champaign University-Willard

Tue 7/8

2:51 pm-9:55 pm

2 stops9h 04m

San Diego

Sat 7/12

6:30 am-9:45 pm

2 stops13h 15m

$574

ChampaignSan Diego

CMI - SAN

CMISAN

Champaign University-Willard

Thu 7/17

3:20 pm-8:04 pm

1 stop6h 44m

San Diego

Sun 7/20

6:15 am-2:50 pm

1 stop6h 35m

$582

ChampaignSan Diego

CMI - SAN

CMISAN

Champaign University-Willard

Thu 7/10

6:00 am-12:22 pm

1 stop8h 22m

San Diego

Mon 7/14

9:50 am-9:45 pm

2 stops9h 55m

$588

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/25

Showing 1-10 of 18 results
1
2

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.
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.

Cheapflights Insights

Everything you need to know about your flight from Champaign to San Diego

What is the cheapest month to book a flight from Champaign to San Diego?

Currently, August is the cheapest month in which you can book a flight from Champaign to San Diego (average of $286). Flying from Champaign to San Diego in March is currently the most expensive (average of $366). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Rainfall in San Diego by month

Plan your trip to San Diego by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Diego ranges from 0.0 - 2.3 inches per month. February is typically the wettest month, when rainfall can reach 2.3 in. July is typically the driest time to visit San Diego when rainfall is around 0.0 in.

Temperature in San Diego by month

Plan your trip to San Diego by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Diego, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 57.2 F).

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 June 26, 2025.
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.
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Comfort

7.2

Food

6.5

Overall

7.2

Entertainment

6.9

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Diana,Jul 2024

ORD - IND

Shout out to Isabelle and Debbie who went above and beyond to make it a good experience. Wheelchair service and workers were excellent and much appreciated.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Comfort

7.2

Food

6.5

Overall

7.2

Entertainment

6.9

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Diana,Jul 2024

ORD - IND

Shout out to Isabelle and Debbie who went above and beyond to make it a good experience. Wheelchair service and workers were excellent and much appreciated.

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.

  • What is the cheapest airline to fly from Champaign to San Diego round-trip?

    American Airlines, at $490, was found to be the cheapest airline from Champaign to San Diego..

  • Can I find deals for flights from Champaign to San Diego that include hotel bookings?

    Yes. In addition to deals on Champaign to San Diego flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Champaign to San Diego?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Champaign to San Diego.

  • Can I find deals for business class flights from Champaign to San Diego?

    Yes. Cheapflights offers flight deals from Champaign to San Diego by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Champaign to San Diego?

    Currently, August is the cheapest month in which you can book a flight from Champaign to San Diego (average of $286). Flying from Champaign to San Diego in March is currently the most expensive (average of $366). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Champaign?

Book flights to Champaign if you plan to visit one of these locations
El Cajon
Chula Vista
Coronado
National City
Lemon Grove
Imperial Beach
La Mesa
Poway
Alpine
Santee

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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 2,558,603 searches. Data last updated June 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$268Average$391FlexibilityNo cancel feeOn-time71%

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