Direct (nonstop) flights from Ontario to Baltimore
1 airline flys nonstop from Ontario International Airport (ONT) to Baltimore Washington International (BWI). It's 2,283 miles (3,674 km), about 4h 40m in the air. Operated by Southwest Airlines.
Southwest Airlines
Route data last updated: May 26, 2026
Airlines with non-stop flights
WN
Southwest Airlines
Alternative Routes
Other ways to fly from Ontario to Baltimore with one stop · direct emits 386 kg CO₂ per passenger
Looking for the return flight?
BWI → ONT: Flights from Baltimore to OntarioOther direct flights from Ontario
Direct flights from Baltimore (BWI)
Frequently Asked Questions
How long is the direct flight from Ontario to Baltimore?
A nonstop flight from Ontario (ONT) to Baltimore (BWI) takes approximately 4 hours and 40 minutes. The distance is 2,283 miles (3,674 km).
Which airlines fly nonstop from Ontario to Baltimore?
Just Southwest Airlines.
Is there a nonstop flight from Ontario to Baltimore?
Yes. 1 airline: Southwest Airlines.
How far is Ontario from Baltimore?
The flight distance from Ontario to Baltimore is 2,283 miles (3,674 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as New York to Los Angeles.
What type of aircraft flies from Ontario to Baltimore?
At 4h 40m, this route typically uses narrow-body or mid-range jets — Boeing 737 MAX or Airbus A320neo. Varies by airline.
What is the carbon footprint of a flight from Ontario to Baltimore?
Roughly 386 kg CO2 per passenger one-way. That's about the same as driving 1,930 km.
Is the return flight from Baltimore to Ontario also nonstop?
Yes — nonstop flights run both ways. Flight time may differ slightly due to wind patterns.
When is the cheapest time to fly from Ontario to Baltimore?
Midweek flights (Tue/Wed) outside holiday peaks are usually cheapest. 3-6 weeks ahead is a good window for this route. Use "Check Prices" above to compare.
How early should I arrive at Ontario International Airport for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.