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

Oct 1 — Oct 81

How to find the cheapest flight from Champaign (CMI) to San Diego (SAN)

All the information you need to plan the best CMI to SAN flight in 2023: compare Champaign to San Diego flight prices with the expected peak season, weather and rainfall in San Diego.

Popular in


Cheapest in


Average price


Round-trip from

High demand for flights, 24% potential price rise
Best time to find cheap flights, 32% potential price drop
Average for round-trip flights in September 2023
From Champaign University-Willard to San Diego



$278 - $536



57.2 - 71.6 °F



0 - 2.3 inches

What is the cheapest month to fly from Champaign to San Diego?

The best pricing can be found in the month of January. Prices to San Diego from Champaign average $681. You can even find prices in January for less than $681, as users have found deals to San Diego from as low as $401. The month of July appears to be one of the more expensive times to travel to San Diego from Champaign. Flying in the targeted month can save you up to 31%.

When is the cheapest time to fly from Champaign to San Diego (CMI - SAN)?

When flying from Champaign to San Diego, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Related info for your journey

Useful info, stats and facts about Champaign to San Diego flights.

What does CMI to SAN mean?

CMI and SAN are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. CMI to SAN refers to a flight route from Champaign University-Willard Airport to San Diego Airport.

Top airline flying from Champaign to San Diego

The chart below displays the airlines Cheapflights users traveling from Champaign to San Diego choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
American AirlinesCheapest$438Average$609FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

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How does Cheapflights help users find flights from Champaign to San Diego?

Cheapflights makes it easy to find Champaign to San Diego flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Champaign to San Diego?

Millions of users choose and trust Cheapflights to book the best flight deals from Champaign to San Diego for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Champaign to San Diego with no change fees?

Yes! Cheapflights helps users easily find flights from Champaign to San Diego with no change fees.

Can Cheapflights notify me if prices for flights from Champaign to San Diego become cheaper?

Yes, Cheapflights does offer price alerts on Champaign to San Diego flights so you can book your travels when it’s right. The Price Alert feature is available after a flight search is performed above.

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