Flights from Baltimore to Ontario

Our cheapest offers for flights from Baltimore to Ontario

Here you can compare cheap flights from Baltimore (BWI) to Ontario (ONT) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Ontario. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
Baltimore
Ontario
Outbound
11/09/25
2 Stopovers (ATL, SFO)
F92633, F91949, F92678
20h 50min
Return
12/07/25
2 Stopovers (IAH, ATL)
F93132, F91404, F94712
30h 28min
Frontier Airlines ?
$399
Best option
Baltimore
Ontario
Outbound
11/09/25
1 Stopover (ORD)
UA0590, UA2738
08h 19min
Return
12/07/25
1 Stopover (DEN)
UA1417, UA0709
06h 26min
United Airlines
$596
Baltimore
Ontario
Outbound
11/09/25
2 Stopovers (DFW, SEA)
F91475, AS0365, AS0664
20h 18min
Return
12/07/25
1 Stopover (SFO)
UA1341, UA0737
09h 38min
Frontier Airlines, Alaska Airlines ?
$457
Baltimore
Ontario
Outbound
11/09/25
1 Stopover (DEN)
UA0540, UA0430
23h 21min
Return
12/07/25
1 Stopover (DEN)
UA2446, UA0709
14h 55min
United Airlines ?
$473
Baltimore
Ontario
Outbound
11/09/25
1 Stopover (SEA)
HA4841, HA6834
10h 39min
Return
12/07/25
1 Stopover (DFW)
AA2198, AA2251
07h 08min
Hawaiian Airlines ?
$671
Prices based on recent searches, subject to last-minute changes
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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

Flight information: Baltimore - Ontario

Roundtrip from $398.33
Flight duration min. 07:45
Return flight duration min. 05:35
Distance 3670 km
Flights per week 6
Departure airport Airport Baltimore-Washington International-Thurgood Marshall Airport, MD (BWI)
Arrival airport Airport Ontario-CA (ONT)
Destination country Flights to United States
Alternative routes to United States
Alternative flights to Ontario
Flight destinations with a similar price
Flight destinations with a similar price