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Cheap flights to Riverside

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Flight deals to Riverside

Looking for a cheap last-minute deal or the best roundtrip flight to Riverside? Find our lowest prices on one-way and roundtrip tickets to the most convenient airport right here.
Ontario.$49 per passenger.Departing Sat, Feb 28, returning Mon, Mar 2.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Harry Reid on Sat, Feb 28, arriving in Ontario International.Inbound direct flight with Frontier Airlines departing from Ontario International on Mon, Mar 2, arriving in Harry Reid.Price includes taxes and charges.From $49, select.
Ontario.$50 per passenger.Departing Thu, Mar 26, returning Tue, Apr 21.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Harry Reid on Thu, Mar 26, arriving in Ontario International.Inbound direct flight with Frontier Airlines departing from Ontario International on Tue, Apr 21, arriving in Harry Reid.Price includes taxes and charges.From $50, select.
Ontario.$51 per passenger.Departing Thu, Feb 26, returning Sat, Feb 28.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Harry Reid on Thu, Feb 26, arriving in Ontario International.Inbound direct flight with Frontier Airlines departing from Ontario International on Sat, Feb 28, arriving in Harry Reid.Price includes taxes and charges.From $51, select.
Ontario.$51 per passenger.Departing Tue, Mar 3, returning Wed, Mar 4.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Harry Reid on Tue, Mar 3, arriving in Ontario International.Inbound direct flight with Frontier Airlines departing from Ontario International on Wed, Mar 4, arriving in Harry Reid.Price includes taxes and charges.From $51, select.
Ontario.$52 per passenger.Departing Wed, Apr 15, returning Wed, Apr 22.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Denver International on Wed, Apr 15, arriving in Ontario International.Inbound direct flight with Frontier Airlines departing from Ontario International on Wed, Apr 22, arriving in Denver International.Price includes taxes and charges.From $52, select.
Ontario.$56 per passenger.Departing Sat, Apr 25, returning Sat, May 2.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Denver International on Sat, Apr 25, arriving in Ontario International.Inbound direct flight with Frontier Airlines departing from Ontario International on Sat, May 2, arriving in Denver International.Price includes taxes and charges.From $56, select.
Ontario.$67 per passenger.Departing Mon, May 4, returning Wed, May 6.Round-trip flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departing from Denver International on Mon, May 4, arriving in Ontario International.Inbound direct flight with Frontier Airlines departing from Ontario International on Wed, May 6, arriving in Denver International.Price includes taxes and charges.From $67, select.
Ontario.$155 per passenger.Departing Thu, Mar 26, returning Tue, May 5.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Harry Reid on Thu, Mar 26, arriving in Ontario International.Inbound direct flight with Southwest Airlines departing from Ontario International on Tue, May 5, arriving in Harry Reid.Price includes taxes and charges.From $155, select.
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Flying to Riverside

The things to know before you go.
Fly intoOntario International Airport
Distance to Riverside14.1 miles
Average flight time3 hrs, 2 mins
Most popular airlineSouthwest Airlines
Cheapest flight found$49
Cheapest month to flyFebruary

Find the cheapest time to fly to Riverside

Flexible on travel dates? Find the cheapest month – or even day – to catch a flight to Riverside.
Feb
from $51
Mar
from $51
Apr
from $52
May
from $67
Jun
from $159
Jul
from $169
Aug
from $158
Sep
from $172
Oct
from $220
Nov
from $238
Dec
from $257
Jan
Find prices

Frequently asked questions

The average flight time to Riverside is 5 hours and 31 minutes. We've calculated this based on journeys to Ontario International Airport.
There are three (3) airports near Riverside: Ontario International Airport, San Bernardino Norton AFB Airport, and Santa Ana John Wayne Airport.
Southwest Airlines, American Airlines, Alaska Airlines, Qatar Airways, Delta, British Airways, SkyWest Airlines, and United all offer direct flights to Ontario International Airport.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Riverside but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
Yes – you can fly direct to Ontario International Airport or San Bernardino Norton AFB Airport, and the average flight time is 3 hours and 7 minutes.
The best price we found for a roundtrip flight to Riverside is $49. This is an estimate based on information collected from different airlines and travel providers flying to Ontario International Airport over the last four (4) days and is subject to change and availability.
The cheapest airport near Riverside is Ontario International – which is 14.1 miles away from the center of Riverside. We've found flights to this airport from $49.
After crunching the numbers on our flight calendar, we found that the cheapest date to fly to Ontario International Airport, the closest airport to Riverside, is Saturday, February 28, 2026.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Riverside is around 40 days in advance, so don’t leave your flight to the last minute.
Ontario International Airport is 14.1 miles from Riverside, San Bernardino Norton AFB Airport is 14.6 miles from Riverside, and Santa Ana John Wayne Airport is 33.1 miles from Riverside.
The average temperature in Riverside in February is around 52°F. The warmest month in Riverside is typically August, which averages 92°F. The coolest month is December, with temperatures averaging 40°F. The rainiest month is February, and it usually rains the least in June.
Currently, the cheapest airline that flies to Ontario International Airport – the closest airport to Riverside – is Frontier Airlines.
Ontario International Airport is 14.1 miles from Riverside which is approximately 27 minutes driving time. Check out the options for car rental at Ontario International Airport.
San Bernardino Norton AFB Airport is 14.6 miles from Riverside which is approximately 25 minutes driving time. Check out the options for car rental at San Bernardino Norton AFB Airport.
Santa Ana John Wayne Airport is 33.1 miles from Riverside which is approximately 45 minutes driving time. Check out the options for car rental at Santa Ana John Wayne Airport.