Cheap Flights from Seoul (ICN) to Ontario Intl. Airport (ONT)

Based on fares listed within the last 7 days on Expedia for flights departing within the next year, round-trip journeys from Incheon Airport to Ontario Airport start from . Make your booking ASAP to score the best price for your journey. Prices and availability are subject to change. Additional terms apply.

Every air carrier has its own terms and conditions. If you decide to cancel your trip, head to our Customer Service Portal.

Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for ICN to Los Angeles - Ontario Intl. Airport (ONT) flights, you'll see a "no change fees" filter for you to select.

With around 9,700 kilometres separating South Korea and Ontario, your flight will be a long one. Pack wisely and make your trip more comfortable. Simple things like a spare pair of socks and a good neck pillow should be in your carry-on bag.

If you want to travel straight from ICN to Ontario Airport, you'll need to book a flight with one or more stops. Unfortunately, there aren't any airlines that fly directly on this route.

Late planners can occasionally score a bargain, with some of the cheapest airfares from Seoul–Incheon Intl. Airport to Los Angeles - Ontario Intl. Airport (ONT) showing up a few weeks prior to the departure date. If you'd rather book ahead of time, Expedia compares and updates all the best flight deals continually — as early as 12 months in advance in some cases. It does depend on the carrier though, as not all airlines advertise prices so far in advance.