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$324+ Cheap flights from Champaign to San Diego (CMI - SAN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
CMI — SAN
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
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 July 2, 2025.

Round-trip from

$414
(American Airlines)

One-way from

$324
(American Airlines)

Popular in

June

Cheapest in

February

Average price

$477
From Champaign University-Willard to San Diego
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One-way flight from Champaign University-Willard to San Diego
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Highest demand for flights based on searches. 10% potential increase in price ($54 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 2, 2025.

This American Airlines deal was found by Cheapflights users on 7/2. 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 8/316:36 pmCMI - SAN
1 stop6h 47mAmerican Airlines
Sat 9/2012:38 pmSAN - CMI
1 stop6h 14mAmerican Airlines
Deal found 7/2$414

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 July 2, 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

Sun 8/31

6:40 am-12:15 pm

1 stop7h 35m

San Diego

Tue 9/16

11:30 am-8:41 pm

1 stop7h 11m

$414

ChampaignSan Diego

CMI - SAN

CMISAN

Champaign University-Willard

Tue 11/11

5:00 am-9:26 am

1 stop6h 26m

$324

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

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.

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 July 2, 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

Food

6.5

Boarding

7.5

Comfort

7.2

Entertainment

6.9

Overall

7.2

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

Food

6.5

Boarding

7.5

Comfort

7.2

Entertainment

6.9

Overall

7.2

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 $414, was found to be the cheapest airline from Champaign to San Diego.. American Airlines is priced at 9% lower than the current average price of a flight leaving 3 months from now.

  • 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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Alternative routes for Champaign to San Diego

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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 July 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$268Average$391FlexibilityNo cancel feeOn-time71%

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