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
09/23/25
1 Stopover (SEA)
AS0349, AS1118
10h 09min
Return
09/30/25
1 Stopover (SEA)
AS1119, AS0344
11h 29min
Alaska Airlines ?
$354
Best option
Baltimore
Ontario
Outbound
08/19/25
1 Stopover (ATL)
DL1267, DL0779
07h 19min
Return
09/02/25
1 Stopover (ATL)
DL0828, DL0801
09h 11min
Delta Air Lines ?
$363
Baltimore
Ontario
Outbound
06/07/25
1 Stopover (DEN)
F92705, F91261
18h 52min
Return
06/23/25
1 Stopover (DEN)
F91500, F92706
12h 26min
Frontier Airlines
$369
Baltimore
Ontario
Outbound
07/02/25
1 Stopover (DEN)
F92705, F91499
09h 30min
Return
07/25/25
1 Stopover (DEN)
F91500, F92706
12h 27min
Frontier Airlines
$371
Baltimore
Ontario
Outbound
09/23/25
1 Stopover (SEA)
AS0349, AS1118
10h 09min
Return
09/30/25
1 Stopover (SEA)
AS1119, AS0344
11h 29min
Alaska Airlines ?
$376
Baltimore
Ontario
Outbound
08/28/25
1 Stopover (ATL)
DL1267, DL0779
07h 19min
Return
09/19/25
1 Stopover (ATL)
DL0828, DL0801
09h 08min
Delta Air Lines ?
$393
Baltimore
Ontario
Outbound
10/18/25
1 Stopover (DFW)
AA1213, AA0711
07h 49min
Return
11/17/25
1 Stopover (SEA)
AS0665, AS0344
10h 40min
American Airlines ?
$398
Baltimore
Ontario
Outbound
07/02/25
1 Stopover (CLT)
AA0997, AA2276
09h 14min
Return
07/25/25
1 Stopover (DFW)
AA2773, AA2314
09h 44min
American Airlines ?
$402
Baltimore
Ontario
Outbound
08/19/25
1 Stopover (SEA)
HA4841, HA6813
09h 55min
Return
09/02/25
1 Stopover (SEA)
HA6290, HA6635
12h 31min
Hawaiian Airlines
$403
Baltimore
Ontario
Outbound
07/02/25
1 Stopover (DEN)
F92705, F91499
09h 30min
Return
07/25/25
1 Stopover (DEN)
F92908, F92706
20h 03min
Frontier Airlines ?
$423
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 $353.76
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