Flight Routes from Baltimore to Ontario

Compare cheap outbound and return flights from Baltimore (BWI) to Ontario (ONT) and find the best offer from numerous airlines and travel agencies.

Trip type
Cheapest roundtrip flight
from€675
Fastest outbound flight
Fastest inbound flight
non-stop flights
6x / week
Flight distance
3,670 km
Time difference

Flight schedule from Baltimore (BWI) to Ontario (ONT)

Select a travel date in the flight schedule for the route from Baltimore (BWI) to Ontario (ONT) and compare affordable flight deals.

offers
Active filtersnone
Matching outbound flights2 of 2
fromto
dep.arr.
durationstopovers
  1. September 6 – 12, 2026
  2. September 13 – 19, 2026
  3. September 20 – 26, 2026
    1. BWIONT
      nonstop
      1. Southwest Airlines
    2. BWIONT
      1 stopover
      1. Frontier Airlines

      Tips and tricks to help you find cheap flights from Baltimore to Ontario

      Favorite airline: Frontier Airlines
      40 % of flights from Baltimore to Ontario are booked with Frontier Airlines.
      Frontier Airlines
      40 %
      Delta
      20 %
      United Airlines
      20 %
      Favourite connection: via Denver
      Stopover flights on this route are especially popular via Denver, making up 86 % of bookings.
      Route
      bookings
      1 stopover Denver International Airport, CO
      12h 41min, from $323
      86 %
      1 stopover Seattle-Tacoma International Airport, WA
      19h 54min, from $459
      14 %

      Important flight information

      Discover more flights around Baltimore and Ontario

      Departure airport Airport Baltimore-Washington International-Thurgood Marshall Airport, MD (BWI)
      Arrival airport Airport Ontario-CA (ONT)
      Destination country Flights to United States
      Departure airport - Destination country Baltimore-Washington International-Thurgood Marshall Airport, MD - United States
      Alternative routes to United States
      Alternative flights to Ontario
      Flight destinations with a similar price