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Flights from San Diego to Champaign

Search cheap flights from San Diego to Champaign in the next 3 months. Based on Trip.com's latest 7-day data, one-way fares start at US$251, and round-trip tickets start at US$536.

      • SAN 11:07
        8h 52m
        1 stop
        CMI 21:59
        San Diego - Champaign | Thu, Jul 9 | American Airlines
        CMI 14:46
        7h 17m
        1 stop
        SAN 20:03
        Champaign - San Diego | Wed, Jul 15 | American Airlines
        US$536 US$1,095
        51% off
        51% off
        US$1,095 US$536
      • SAN 11:07
        8h 52m
        1 stop
        CMI 21:59
        San Diego - Champaign | Sat, Jul 11 | American Airlines
        CMI 18:36
        6h 50m
        1 stop
        SAN 23:26
        Champaign - San Diego | Fri, Jul 17 | American Airlines
        US$541 US$1,095
        51% off
        51% off
        US$1,095 US$541
      • SAN 10:59
        9h 2m
        1 stop
        CMI 22:01
        San Diego - Champaign | Thu, Jun 25 | American Airlines
        CMI 18:43
        7h 5m
        1 stop
        SAN 23:48
        Champaign - San Diego | Mon, Jun 29 | American Airlines
        US$562 US$1,095
        49% off
        49% off
        US$1,095 US$562
      • SAN 13:55
        6h 6m
        1 stop
        CMI 22:01
        San Diego - Champaign | Sun, Jun 28 | American Airlines
        CMI 14:46
        6h 33m
        1 stop
        SAN 19:19
        Champaign - San Diego | Wed, Jul 1 | American Airlines
        US$620
        43% off
        US$1,095 US$620
      • SAN 13:55
        6h 6m
        1 stop
        CMI 22:01
        San Diego - Champaign | Fri, Jun 19 | American Airlines
        CMI 18:43
        7h 5m
        1 stop
        SAN 23:48
        Champaign - San Diego | Thu, Jun 25 | American Airlines
        US$625
        43% off
        US$1,095 US$625
      • SAN 07:30
        8h 36m
        1 stop
        CMI 18:06
        San Diego - Champaign | Mon, Jul 6 | American Airlines
        CMI 07:29
        8h 48m
        1 stop
        SAN 14:17
        Champaign - San Diego | Sun, Jul 12 | American Airlines
        US$636
        42% off
        US$1,095 US$636
      • SAN 13:55
        6h 6m
        1 stop
        CMI 22:01
        San Diego - Champaign | Thu, Jul 2 | American Airlines
        CMI 06:04
        8h 23m
        1 stop
        SAN 12:27
        Champaign - San Diego | Wed, Jul 8 | American Airlines
        US$644
        41% off
        US$1,095 US$644
      • SAN 06:15
        12h 53m
        1 stop
        CMI 21:08
        San Diego - Champaign | Mon, Jun 29 | American Airlines
        CMI 18:36
        6h 52m
        1 stop
        SAN 23:28
        Champaign - San Diego | Sat, Jul 4 | American Airlines
        US$660
        40% off
        US$1,095 US$660
      • SAN 22:45
        10h 18m
        1 stop
        CMI 11:03
        San Diego - Champaign | Mon, Jun 22 | American Airlines
        CMI 18:43
        7h 5m
        1 stop
        SAN 23:48
        Champaign - San Diego | Sun, Jun 28 | American Airlines
        US$865
        21% off
        US$1,095 US$865
      • SAN 13:00
        17h 25m
        1 stop
        CMI 14:00
        San Diego - Champaign | Sat, Jun 20 | Normal Airline
        CMI 15:00
        6h
        Nonstop
        SAN 16:00
        Champaign - San Diego | Mon, Jun 22 | Normal Airline
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      • SAN 22:40
        8h 14m
        1 stop
        CMI 08:54
        San Diego - Champaign | Mon, Jul 20 | United Airlines
        US$251 US$589
        56% off
        56% off
        US$589 US$251
      • SAN 06:40
        9h 9m
        1 stop
        CMI 17:49
        San Diego - Champaign | Tue, Jul 21 | United Airlines
        US$251 US$589
        56% off
        56% off
        US$589 US$251
      • SAN 07:30
        8h 35m
        1 stop
        CMI 18:05
        San Diego - Champaign | Thu, Jul 16 | American Airlines
        US$375 US$589
        36% off
        36% off
        US$589 US$375
      • SAN 12:20
        7h 39m
        1 stop
        CMI 21:59
        San Diego - Champaign | Mon, Jul 20 | American Airlines
        US$382
        35% off
        US$589 US$382
      • SAN 06:15
        9h 51m
        1 stop
        CMI 18:06
        San Diego - Champaign | Tue, Jul 21 | American Airlines
        US$413
        30% off
        US$589 US$413
      • SAN 12:20
        7h 39m
        1 stop
        CMI 21:59
        San Diego - Champaign | Wed, Jul 8 | American Airlines
        US$426
        28% off
        US$589 US$426
      • SAN 13:41
        6h 19m
        1 stop
        CMI 22:00
        San Diego - Champaign | Sun, Aug 9 | American Airlines
        US$430
        27% off
        US$589 US$430
      • SAN 10:59
        9h 2m
        1 stop
        CMI 22:01
        San Diego - Champaign | Wed, Jun 24 | American Airlines
        US$436
        26% off
        US$589 US$436
      • SAN 11:07
        8h 52m
        1 stop
        CMI 21:59
        San Diego - Champaign | Sun, Jul 19 | American Airlines
        US$465
        21% off
        US$589 US$465
      • SAN 13:00
        17h 25m
        1 stop
        CMI 14:00
        San Diego - Champaign | Sat, Jun 20 | Normal Airline
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Displayed flight fares from San Diego to Champaign are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

San Diego to Champaign Flight Details

The distance between San Diego and Champaign is about 2,698.23 km. Based on Trip.com's latest data, travel demand is highest in September. The off-season for travel is August.

Cheapest one-way flight priceUS$251
Cheapest return ticket priceUS$536
Cheapest monthAugust
Peak season for travelSeptember
Flight distance2,698.23 km
Flight statistics for the San Diego–Champaign route are based on aggregated booking data from Trip.com over the past 12 months.

Frequently Asked Questions

  • What are the cheapest flights from San Diego to Champaign (SAN-CMI)?

    Based on Trip.com data, United Airlines offers one-way fares as low as US$251 on Cheapest nonstop routes (e.g. SAN to CMI on Mon, Jul 20), while American Airlines offers Cheapest nonstop round-trips from US$536 departing on Thu, Jul 9 and returning on Wed, Jul 15.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from San Diego to Champaign is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from San Diego to Champaign, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Mon, Jul 20, with one-way flights priced at just US$251.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is United Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Champaign travel is around September.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from San Diego to Champaign is August, when demand for travel is lower.
  • After crunching the numbers on our June flight calendar, it's currently cheapest to fly from San Diego to Champaign on June 24, 2026 with American Airlines, with prices starting at US$562.
  • The time difference between Champaign and San Diego is 2h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

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Note: Prices shown on this page are the estimated lowest prices found in the last 24 hours and include all taxes and fees.

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Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are clearly shown before you pay. Charges for checked baggage, onboard meals, Wi‑Fi, and other optional services are also included where applicable in the flight cards.

Real-time pricing updates

Prices, availability, and travel details on this page have been updated within the last 24 hours, and for many routes are refreshed in real time. The more popular the route, the more accurate and up-to-date the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.