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Flights from Dubuque to San Diego

Find the cheapest flight options from Dubuque to San Diego over the next three months. Book one-way tickets from €221 and round-trip tickets from €431.

      • DBQ 07:15
        17h 15m
        1 stop
        SAN 22:30
        Dubuque - San Diego | Mon, Dec 15 | Denver Air Connection
        SAN 07:00
        8h 55m
        1 stop
        DBQ 17:55
        San Diego - Dubuque | Wed, Dec 17 | United Airlines
        €431 €590
        27% OFF
        27% OFF
        €590 €431
      • DBQ 13:00
        17h 25m
        1 stop
        SAN Invalid Date
        Dubuque - San Diego | Sun, Dec 14 | Normal Airline
        SAN 15:00
        6h
        Direct
        DBQ 16:00
        San Diego - Dubuque | Tue, Dec 16 | Normal Airline
        Find More Flights
        Find More Flights
      • DBQ 07:15
        10h 18m
        1 stop
        SAN 15:33
        Dubuque - San Diego | Sun, Feb 8 | Denver Air Connection
        €221 €303
        27% OFF
        27% OFF
        €303 €221
      • DBQ 13:00
        17h 25m
        1 stop
        SAN Invalid Date
        Dubuque - San Diego | Sun, Dec 14 | Normal Airline
        Find More Flights
        Find More Flights

Displayed flight fares from Dubuque to San Diego are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flight details for Dubuque to San Diego

The distance between Dubuque and San Diego is 2,554.98 km. Based on Trip.com's data, travel demand peaks in August. The off-season for travel is December.

Cheapest one-way flight price€221
Cheapest round-trip ticket price€431
Off-season for travelDecember
Peak season for travelAugust
Flight distance2,554.98 km

Find the best time to fly from Dubuque to San Diego

The cheapest time for Dubuque to San Diego flights: Dec 14 to Dec 21 — one way flight prices from €214.

Cheapest flights
From price
Search
  • 714
  • 1421
  • 2128

  • Jan

    284
  • 411
  • 1118
  • 1825

  • Feb

    251
  • 18
  • 815
  • 1522

  • Mar

    221
Displayed fare trends are based on Trip.com's aggregated average of the lowest flight prices from Dubuque to San Diego, calculated over the upcoming 10 weeks.

Flight FAQs

  • What are the cheapest flights from Dubuque to San Diego (DBQ-SAN)?

    Based on Trip.com data, Denver Air Connection offers one-way fares as low as €221 on Cheapest nonstop routes (e.g. DBQ to SAN on Sun, Feb 8), while Denver Air Connection offers Cheapest nonstop round-trips from €431 departing on Mon, Dec 15 and returning on Wed, Dec 17.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Dubuque to San Diego 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 Dubuque to San Diego, 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 Sun, Feb 8, with one-way flights priced at just €221.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Denver Air Connection.
    · 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 San Diego travel is around August.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Dubuque to San Diego is December, when demand for travel is lower.
  • After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Dubuque to San Diego on December 15, 2025 with Denver Air Connection, with prices starting at €430.
  • The time difference between San Diego and Dubuque 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.