Cheap Flights from Redmond OR to Ontario International CA from $241

Compare Redmond to Ontario International flight deals

Find the cheapest month or even day of the year to fly to Ontario International

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Flight deals from Redmond to Ontario International

Looking for a cheap last-minute deal or the best round-trip flight from Redmond Airport to Ontario International Airport? If you want to travel next month, round-trip fares start from $258. Find the lowest prices on one-way and round-trip tickets right here.

Ontario.$241 per passenger.Departing Tue, Jan 5, returning Wed, Jan 27.Round-trip flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departing from Redmond on Tue, Jan 5, arriving in Ontario International.Inbound indirect flight with Alaska Airlines, departing from Ontario International on Wed, Jan 27, arriving in Redmond.Price includes taxes and charges.From $241, select.

Ontario.$241 per passenger.Departing Wed, Feb 24, returning Tue, Mar 2.Round-trip flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departing from Redmond on Wed, Feb 24, arriving in Ontario International.Inbound indirect flight with Alaska Airlines, departing from Ontario International on Tue, Mar 2, arriving in Redmond.Price includes taxes and charges.From $241, select.

Ontario.$241 per passenger.Departing Wed, Oct 28, returning Wed, Nov 4.Round-trip flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departing from Redmond on Wed, Oct 28, arriving in Ontario International.Inbound indirect flight with Alaska Airlines, departing from Ontario International on Wed, Nov 4, arriving in Redmond.Price includes taxes and charges.From $241, select.

Ontario.$241 per passenger.Departing Wed, Jul 1, returning Tue, Jul 7.Round-trip flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departing from Redmond on Wed, Jul 1, arriving in Ontario International.Inbound indirect flight with Alaska Airlines, departing from Ontario International on Tue, Jul 7, arriving in Redmond.Price includes taxes and charges.From $241, select.

Ontario.$241 per passenger.Departing Sat, Aug 15, returning Sun, Aug 23.Round-trip flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departing from Redmond on Sat, Aug 15, arriving in Ontario International.Inbound indirect flight with Alaska Airlines, departing from Ontario International on Sun, Aug 23, arriving in Redmond.Price includes taxes and charges.From $241, select.

Ontario.$241 per passenger.Departing Fri, Dec 4, returning Sun, Dec 13.Round-trip flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departing from Redmond on Fri, Dec 4, arriving in Ontario International.Inbound indirect flight with Alaska Airlines, departing from Ontario International on Sun, Dec 13, arriving in Redmond.Price includes taxes and charges.From $241, select.

Ontario.$257 per passenger.Departing Fri, May 29, returning Sun, May 31.Round-trip flight with United.Outbound indirect flight with United, departing from Redmond on Fri, May 29, arriving in Ontario International.Inbound indirect flight with United, departing from Ontario International on Sun, May 31, arriving in Redmond.Price includes taxes and charges.From $257, select.

Ontario.$258 per passenger.Departing Tue, May 19, returning Wed, Jun 10.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Redmond on Tue, May 19, arriving in Ontario International.Inbound indirect flight with Delta, departing from Ontario International on Wed, Jun 10, arriving in Redmond.Price includes taxes and charges.From $258, select.

Ontario.$258 per passenger.Departing Wed, Jun 3, returning Sat, Jun 6.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Redmond on Wed, Jun 3, arriving in Ontario International.Inbound indirect flight with Delta, departing from Ontario International on Sat, Jun 6, arriving in Redmond.Price includes taxes and charges.From $258, select.

Ontario.$258 per passenger.Departing Tue, Jun 23, returning Sat, Jul 4.Round-trip flight with United.Outbound indirect flight with United, departing from Redmond on Tue, Jun 23, arriving in Ontario International.Inbound indirect flight with United, departing from Ontario International on Sat, Jul 4, arriving in Redmond.Price includes taxes and charges.From $258, select.

Ontario.$266 per passenger.Departing Sat, Sep 5, returning Sun, Sep 6.Round-trip flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departing from Redmond on Sat, Sep 5, arriving in Ontario International.Inbound indirect flight with Alaska Airlines, departing from Ontario International on Sun, Sep 6, arriving in Redmond.Price includes taxes and charges.From $266, select.

Ontario.$267 per passenger.Departing Sat, Nov 14, returning Sun, Nov 22.Round-trip flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departing from Redmond on Sat, Nov 14, arriving in Ontario International.Inbound indirect flight with Alaska Airlines, departing from Ontario International on Sun, Nov 22, arriving in Redmond.Price includes taxes and charges.From $267, select.

Ontario.$292 per passenger.Departing Fri, Jul 31, returning Tue, Aug 4.Round-trip flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departing from Redmond on Fri, Jul 31, arriving in Ontario International.Inbound indirect flight with Alaska Airlines, departing from Ontario International on Tue, Aug 4, arriving in Redmond.Price includes taxes and charges.From $292, select.

Find the cheapest month to fly from Redmond to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Redmond to Ontario International flights are currently cheapest in July.

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Redmond to Ontario International: Alternative routes

Compare routes from Redmond to Ontario below. You may find an airport to fly into that's cheaper, faster, or easier than Ontario International.

Redmond to Ontario: Flight information

The things to know before you go.

Cheapest flight found	$241
Cheapest month to fly	August

Finding cheap flights from Redmond to Ontario International: Frequently asked questions

How much are round-trip flights from Redmond to Ontario International?

The best price we found for a round-trip flight from Redmond to Ontario International is $241. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

Which airlines fly direct from Redmond to Ontario International?

Currently, there are no airlines that fly direct from Redmond to Ontario International. But we found flights with one or more stops from $241.

How many flights are there a week from Redmond to Ontario International?

There are no flights flying from Redmond to Ontario International, as of May 2026.

When is the cheapest time to fly from Redmond to Ontario International?

The cheapest month to fly from Redmond to Ontario International is usually August.

Which upcoming date is cheapest to fly from Redmond Airport to Ontario International Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Redmond Airport to Ontario International Airport on Saturday, August 15, 2026.

Can I get a direct flight from Redmond Airport to Ontario International Airport?

No airlines currently offer direct flights between Redmond Airport and Ontario International Airport. Most routes have one or more stops.

When is the best time to book flights to Ontario?

We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Ontario is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly with from Redmond Airport to Ontario International?

Currently, Alaska Airlines offers the cheapest flight tickets to Ontario International.

Flying from Roberts Field Airport (RDM) to Ontario International Airport (ONT): what you need to know

Redmond and Ontario share the UTC-7 timezone. This means you won't have to adjust your watch after you land.
Arriving two hours before an international flight and one hour ahead of a domestic departure are golden rules for stress-free travel. Show up at the airport on time to board your RDM to ONT flight.
During popular months like July, you'll want to get to the airport earlier. Plan to arrive two hours before domestic departures and four hours ahead for an international flight whenever you're traveling during a high season in general.
If you want to include a stop along the way, simply deselect 'Direct flights only' when searching for your ticket from Roberts Field Airport to Ontario International Airport. These are the most popular stopovers between RDM and ONT:
- Phoenix Sky Harbor International Airport
- Seattle-Tacoma International Airport
- San Francisco International Airport

How to find the cheapest flights from Roberts Field Airport (RDM) to Ontario International Airport (ONT)

Currently, $107 is the lowest price we've found for a one-way Roberts Field Airport to Ontario International Airport flight. The best price for a return plane ticket is $241. Remember that fares can change due to demand at the time of booking.
To score cheap tickets from RDM to ONT, book ahead. Airlines generally offer their best fares when flights are first released.
Finding cheap flights from Roberts Field Airport to Ontario International Airport is more likely if you can be flexible with your dates. Use the 'Whole month' search function to see the lowest prices throughout the month and bag a great deal.
Snapping up cheap flights from RDM to ONT couldn't be easier with Price Alerts. Simply create one of these automatic alerts and we'll let you know when a new deal comes up.
Secure the ideal flight for you by using the filters. To see the 'Fastest,' 'Cheapest' or 'Best' flights from Roberts Field Airport to Ontario International Airport, use the 'Sort by' tool. You can also filter results by airline, arrival and departure times, and journey duration.

Handy information about Roberts Field Airport (RDM)

76.41% of flights leaving from Roberts Field Airport make it to their destination on time.
To get to Roberts Field Airport from central Redmond, it'll take about 10 minutes if you're going by car. Of course, this depends on traffic conditions. It's approximately 3 kilometers from the airport to the city center.
The trip when using public transport usually takes 50 minutes.
Get your travels off to a relaxed start by staying near RDM. Whether you're taking an early flight from Roberts Field Airport to Ontario International Airport or just don't like being rushed, these hotels are perfect:

Arriving at Ontario International Airport (ONT)

Reserve a hotel close to ONT if you have a late Roberts Field Airport to Ontario International Airport flight. Select one of these accommodation options and avoid the hassle of a long transfer:
Go wherever you want, whenever you want with an Ontario International Airport rental car. Pick up your wheels from Dollar, Fox - Rent A Car or Thrifty and chase adventure across Ontario and beyond.
Reserving your ride from Ontario International Airport around three weeks ahead can help you get the lowest rate.

Getting from Ontario International Airport (ONT) to central Ontario

ONT is located at 2900 E. Airport Drive.
From Ontario International Airport, Ontario is approximately 6 kilometers away. It takes around 10 minutes to get to the center driving.
Getting there by public transport takes about 1 hour 30 minutes.

When to fly to Ontario International Airport (ONT)

The quietest month for a flight from Roberts Field Airport to Ontario International Airport is May, while August is the most popular. Pick the best time to go to Ontario based on whether you prefer a more relaxed vibe or a faster pace.
The warmest month in Ontario is August, with the temperature ranging between 15ºC (59ºF) and 35ºC (95ºF). Book your flights from Roberts Field Airport to Ontario International Airport in this month if this is the type of weather you enjoy.
Search for cheap tickets from RDM to ONT in January if you like cooler conditions. Temperatures are at their lowest around then, ranging between 4ºC (39ºF) and 23ºC (73ºF) on average.

Explore more of United States

Ontario has plenty to offer, but there are so many other parts of United States you'll want to see. About 56 kilometers west of Ontario, a visit to Los Angeles will keep you busy. Start with leading sights like Griffith Observatory, The Broad and La Brea Tar Pits & Museum.
Around 153 kilometers south of Ontario, San Diego is another essential stop in United States. Start your sightseeing at San Diego Zoo, USS Midway Museum and SeaWorld San Diego.