Ontario International Airport (ONT) serves Ontario; Metropolitan Oakland International Airport (OAK) serves Oakland.
The airports are 362 miles apart by great-circle distance.
Roame's current schedule feed shows nonstop service from ONT to OAK.
Marketing airlines listed in the current schedule, including codeshare sellers, are Frontier Airlines (F9) and Southwest Airlines (WN). This list does not identify the operating airline for each flight; check the flight details before booking.
Published schedule dates span Oct 19, 2026 – Aug 2, 2027.