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€550
Fastest outbound flight
Fastest inbound flight
non-stop flights
6x / week
Flight distance
3,670 km
Time difference

Cheap flight offers from Baltimore to Ontario

sorted by price and recency
  1. –
    American Airlines
    –
    BWI–ONT
    1 stopover
    American Airlines
    –
    ONT–BWI
    1 stopover
    €550
  2. –
    Alaska Airlines
    –
    BWI–ONT
    1 stopover
    Alaska Airlines
    –
    ONT–BWI
    1 stopover
    €843
  3. –
    American Airlines
    –
    BWI–ONT
    1 stopover
    American Airlines
    –
    ONT–BWI
    1 stopover
    €779
  4. –
    Alaska Airlines
    –
    BWI–ONT
    1 stopover
    Alaska Airlines
    –
    ONT–BWI
    1 stopover
    €618
  5. –
    American Airlines
    –
    BWI–ONT
    1 stopover
    American Airlines
    –
    ONT–BWI
    1 stopover
    €3,216
  6. –
    United Airlines
    –
    BWI–ONT
    1 stopover
    United Airlines
    –
    ONT–BWI
    1 stopover
    €604

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 flightsBWI–ONT · 1 of 1
fromto
dep.arr.
durationstopovers
  1. November 15 – 21, 2026
  2. November 22 – 28, 2026
  3. Nov 29 – Dec 5, 2026
    No flights could be found for the active filters.
    1. BWIONT
      nonstop
      1. Southwest 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