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Flights from Dubuque to Ontario

Here are our top budget-friendly flights, offering flexible one-way or round-trip options. Additional flights with other timings and airlines are also available.

      • DBQ 1:00 PM
        17h 25m
        1 stop
        ONT Invalid Date
        Dubuque - Ontario | Fri, Dec 12 | Normal Airline
        ONT 3:00 PM
        6h
        Nonstop
        DBQ 4:00 PM
        Ontario - Dubuque | Sun, Dec 14 | Normal Airline
        Search
        Search
      • DBQ 1:00 PM
        17h 25m
        1 stop
        ONT Invalid Date
        Dubuque - Ontario | Fri, Dec 12 | Normal Airline
        ONT 3:00 PM
        6h
        Nonstop
        DBQ 4:00 PM
        Ontario - Dubuque | Sun, Dec 14 | Normal Airline
        Search
        Search
      • DBQ 1:00 PM
        17h 25m
        1 stop
        ONT Invalid Date
        Dubuque - Ontario | Fri, Dec 12 | Normal Airline
        ONT 3:00 PM
        6h
        Nonstop
        DBQ 4:00 PM
        Ontario - Dubuque | Sun, Dec 14 | Normal Airline
        Search
        Search
      • DBQ 1:00 PM
        17h 25m
        1 stop
        ONT Invalid Date
        Dubuque - Ontario | Fri, Dec 12 | Normal Airline
        ONT 3:00 PM
        6h
        Nonstop
        DBQ 4:00 PM
        Ontario - Dubuque | Sun, Dec 14 | Normal Airline
        Search
        Search
      • DBQ 1:00 PM
        17h 25m
        1 stop
        ONT Invalid Date
        Dubuque - Ontario | Fri, Dec 12 | Normal Airline
        ONT 3:00 PM
        6h
        Nonstop
        DBQ 4:00 PM
        Ontario - Dubuque | Sun, Dec 14 | Normal Airline
        Search
        Search
      • DBQ 1:00 PM
        17h 25m
        1 stop
        ONT Invalid Date
        Dubuque - Ontario | Fri, Dec 12 | Normal Airline
        ONT 3:00 PM
        6h
        Nonstop
        DBQ 4:00 PM
        Ontario - Dubuque | Sun, Dec 14 | Normal Airline
        Search
        Search
      • DBQ 1:00 PM
        17h 25m
        1 stop
        ONT Invalid Date
        Dubuque - Ontario | Fri, Dec 12 | Normal Airline
        ONT 3:00 PM
        6h
        Nonstop
        DBQ 4:00 PM
        Ontario - Dubuque | Sun, Dec 14 | Normal Airline
        Search
        Search
      • DBQ 1:00 PM
        17h 25m
        1 stop
        ONT Invalid Date
        Dubuque - Ontario | Fri, Dec 12 | Normal Airline
        ONT 3:00 PM
        6h
        Nonstop
        DBQ 4:00 PM
        Ontario - Dubuque | Sun, Dec 14 | Normal Airline
        Search
        Search
      • DBQ 1:00 PM
        17h 25m
        1 stop
        ONT Invalid Date
        Dubuque - Ontario | Fri, Dec 12 | Normal Airline
        ONT 3:00 PM
        6h
        Nonstop
        DBQ 4:00 PM
        Ontario - Dubuque | Sun, Dec 14 | Normal Airline
        Search
        Search

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

Flying from Dubuque to Ontario

The distance between Dubuque and Ontario is approximately 2,515.87 km. The off-season for travel is November.

Cheapest one-way flight price€368
Off-season for travelNovember
Flight distance2,515.87 km

When is the cheapest time to fly from Dubuque to Ontario?

The cheapest time for Dubuque to Ontario flights: Jan 18 to Jan 25 — one way flight prices from €279.

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 Ontario, calculated over the upcoming 10 weeks.

Frequently Asked Questions

  • When is the best time to book flights from Dubuque to Ontario?

    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 Ontario 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 Ontario, 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 Sat, Jan 3, with one-way flights priced at just €368.
    · 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.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Dubuque to Ontario is November, when demand for travel is lower.
  • After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Dubuque to Ontario on December 21, 2025 with Denver Air Connection, with prices starting at €642.
  • The time difference between Ontario 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.

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