Ontario (ONT) to Baltimore (BWI) flights

Southwest Airlines flies nonstop from Ontario International Airport to Baltimore/Washington International Thurgood Marshall Airport, with about 7 flights a week in July 2026. The 2,283-mile flight takes about 4h 39m gate to gate.

From
ONT
Ontario
Ontario International Airport
To
BWI
Baltimore
Baltimore/Washington International Thurgood Marshall Airport
Distance
2,283 mi · 3,674 km
Flight time
4h 39m
Airlines
1
Seats filled
72%
Flights a week, July 2026
280 flights and 33,459 passengers in 12 months
BWIBWIONT
Map data: Natural Earth. Lines follow the shortest (great-circle) path.

Airlines flying ONT to BWI

AirlineFlights a weekAircraftPassengers (12 months)Flight time
Southwest Airlines7Boeing 737 MAX 8, Boeing 737-800, Boeing 737-700 / MAX 733,4594h 39m

Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.

Is ONT to BWI on time?

From September 2025 to August 2026, 84% of 254 flights arrived within 15 minutes of schedule and 0.4% were cancelled. Flights leaving around 10am were the most punctual (96%), those around 9am the least (69%). Most delay time was caused by late-arriving aircraft (40%).

AirlineFlightsOn timeAverage delayCancelled
Southwest Airlines25484%8 min0.4%

Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.

On-time arrivals by departure time

Scheduled departureFlightsOn time, relativeOn time
9am to 10am26
69%
10am to 11am26
96%
12pm to 1pm39
82%
9pm to 10pm152
85%

Flights by month

MonthFlightsFlights, relativePassengers
August 202530
3,253
September 202530
3,127
October 202531
3,658
November 202519
2,156
December 202517
2,133
January 20264
651
March 202627
3,015
April 202630
3,755
May 202631
3,882
June 202630
3,957
July 202631
3,872

Related

Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.