Routes and flights · the DOT's airline reports, August 2025 to July 2026

Baltimore/Washington International Thurgood Marshall ⇄ Ontario International BWI–ONT

Airlines flew 560 flights between Baltimore/Washington International Thurgood Marshall BWI in Baltimore, MD and Ontario International ONT in Ontario, CA in the twelve months to July 2026, both directions together: 68,765 passengers in 94,720 seats, 73% of them filled, and 96,550 pounds of freight. 2,283 miles, about 301 minutes in the air, on 1 airline: Southwest Airlines Co. (560). Planning to fly it yourself? The weather and winds along this route right now.

560

flights, twelve months

BWI-ONT: 280 · ONT-BWI: 280

68,765

passengers

73% of seats filled

2,283

miles

about 301 minutes airborne

airline

3 aircraft types

Flights by month both directions

By month, as a table

	flights
6/25	52
7/25	62
8/25	60
9/25	60
10/25	62
11/25	39
12/25	34
1/26	8
3/26	54
4/26	60
5/26	62
6/26	60
7/26	61

Passengers by month

By month, as a table

	passengers
6/25	7,256
7/25	7,776
8/25	6,501
9/25	6,254
10/25	7,349
11/25	4,163
12/25	4,441
1/26	1,219
3/26	6,316
4/26	7,584
5/26	8,288
6/26	8,397
7/26	8,253

The airlines twelve months, both directions

Airline	Flights	Passengers	Seats filled	Service
Southwest Airlines Co. WN	560	68,765	73%	scheduled passenger service

The aircraft as the airlines report their types

Aircraft	Flights	Seats a flight	Passengers
Boeing B737 Max 800	250	175	30,840
Boeing 737-800	218	175	26,745
Boeing 737-700/700LR/Max 7	92	139	11,180

BWI → ONT this direction alone · flown June 2025 to July 2026

280 flights of 281 scheduled, 35,306 passengers in 47,938 seats, 15,476 pounds of freight. Southwest Airlines Co. 280.

ONT → BWI this direction alone · flown June 2025 to July 2026

280 flights of 281 scheduled, 33,459 passengers in 46,782 seats, 81,074 pounds of freight. Southwest Airlines Co. 280.

Source: the Bureau of Transportation Statistics' T-100 Segment table (all carriers). A flight is one departure performed on this segment; seats and passengers are the airlines' own monthly reports; "seats filled" is passengers divided by seats. The miles are the DOT's great-circle distance. Both ends: Baltimore/Washington International Thurgood Marshall BWI and Ontario International ONT; all routes.