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Cheap flights from Charleston to Ontario International

Compare Charleston to Ontario International flight deals

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

Book the best Ontario International fare with no extra fees

Flight deals from Charleston to Ontario International

Looking for a cheap last-minute deal or the best return flight from Charleston Airport to Ontario International Airport? If you want to travel next month, return fares start from P24,064. Find the lowest prices on one-way and return tickets right here.
Ontario.P9,326 per passenger.Departing Thu, 27 Aug.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Charleston on Thu, 27 Aug, arriving in Ontario International.Price includes taxes and charges.From P9,326, select.
Ontario.P11,909 per passenger.Departing Tue, 9 Jun.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Charleston on Tue, 9 Jun, arriving in Ontario International.Price includes taxes and charges.From P11,909, select.
Ontario.P11,978 per passenger.Departing Wed, 15 Jul.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Charleston on Wed, 15 Jul, arriving in Ontario International.Price includes taxes and charges.From P11,978, select.
Ontario.P12,003 per passenger.Departing Sat, 26 Sep.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Charleston on Sat, 26 Sep, arriving in Ontario International.Price includes taxes and charges.From P12,003, select.
Ontario.P12,033 per passenger.Departing Wed, 27 May.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Charleston on Wed, 27 May, arriving in Ontario International.Price includes taxes and charges.From P12,033, select.
Ontario.P12,033 per passenger.Departing Wed, 16 Dec.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Charleston on Wed, 16 Dec, arriving in Ontario International.Price includes taxes and charges.From P12,033, select.
Ontario.P14,595 per passenger.Departing Thu, 29 Oct.One-way flight with Delta.Outbound indirect flight with Delta, departs from Charleston on Thu, 29 Oct, arriving in Ontario International.Price includes taxes and charges.From P14,595, select.

Find the cheapest month to fly from Charleston to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Charleston to Ontario International flights are currently cheapest in August.
May
from P12,033
Jun
from P11,909
Jul
from P11,978
Aug
from P9,326
Sep
from P12,003
Oct
from P14,595
Nov
Find prices
Dec
from P12,033
Jan
Find prices
Feb
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Mar
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Apr
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Charleston to Ontario International: Alternative routes

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

Ontario International

4km from central Ontario
Closest
from P9,326
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San Bernardino Norton AFB

39km from central Ontario
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Santa Ana John Wayne

48km from central Ontario
from P12,015
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Long Beach Municipal

54km from central Ontario
from P14,031
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Hawthorne

65km from central Ontario
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Burbank

67km from central Ontario
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Los Angeles International

71km from central Ontario
Cheapest
from P7,828
Search flights

Charleston to Ontario: Flight information

The things to know before you go.
Cheapest flight foundP9,326
Cheapest month to flyAugust

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

The best price we found for a return flight from Charleston to Ontario International is P16,321. 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.
Currently, there are no airlines that fly direct from Charleston to Ontario International. But we found flights with one or more stops from P16,321.
As of May 2026, there are no flights flying from Charleston to Ontario International.
The cheapest month to fly from Charleston to Ontario International is usually August.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Charleston Airport to Ontario International Airport on Wednesday, 26 August 2026.
No airlines currently offer direct flights between Charleston Airport and Ontario International Airport. Most routes have one or more stops.
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 Ontario International 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.
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.
Currently, Southwest Airlines offers the cheapest flight tickets to Ontario International.

Travelling from Charleston International Airport (CHS) to Ontario International Airport (ONT): what you need to know

  • Ontario's timezone is UTC-7, which makes Ontario three hours behind Charleston.

  • Give yourself enough time to catch your CHS to ONT flight. As a general rule, arrive two hours before international departures and an hour ahead for domestic flights.

  • During popular months such as July, it's best to get to the airport earlier. Plan to arrive two hours before a domestic departure and four hours ahead of international flights when you fly during a peak period in general.

  • Consider adding a stopover when booking your ticket from Charleston International Airport to Ontario International Airport. Simply uncheck 'Direct flights only' to break up your journey, or maybe even explore a new city along the way. Check out these options between CHS and ONT:

    • George Bush Intercontinental Airport

    • Denver International Airport

    • Charlotte Douglas International Airport

How to find the cheapest flights from Charleston International Airport (CHS) to Ontario International Airport (ONT)

  • Currently, P9,326 is the lowest price we've found for a one-way Charleston International Airport to Ontario International Airport flight. The best price for a return ticket is P16,321. Remember that fares could change due to demand at the time of booking.

  • Don't wait until the last minute. You're more likely to find cheap tickets from CHS to ONT if you book early. Airlines often have some terrific early bird discounts.

  • If you're flexible with your travel dates, try using the 'Whole month' tool. It'll show you the cheapest price in each month when looking for your flight from Charleston International Airport to Ontario International Airport.

  • There's no need to check every day to see if fares have gone down when you create a Price Alert. We'll update you the moment a special offer becomes available on cheap flights from CHS to ONT.

  • Tailor your trip using filters. Pick your departure and arrival times, total journey duration and airlines. You can also sort the results by 'Cheapest,' 'Best' or 'Fastest' flights from Charleston International Airport to Ontario International Airport.

Handy information about Charleston International Airport (CHS)

  • Charleston International Airport gets high marks for its on-time performance. 81.5% of flights that depart CHS arrive at their destination without delay.

  • Central Charleston to Charleston International Airport is approximately 21 kilometres. Depending on traffic, it'll take you about 30 minutes to get there if you're catching a cab, ride-sharing or driving.

  • Taking public transport? Expect a trip time of around 3 hours 35 minutes.

  • Booked an early flight from Charleston International Airport to Ontario International Airport? Avoid the last-minute rush to the terminal (and catch some extra z's) by picking one of these stays near CHS:

Arriving at Ontario International Airport (ONT)

Getting from Ontario International Airport (ONT) to central Ontario

  • The address for ONT is 2900 E. Airport Drive.

  • Ontario International Airport to central Ontario has a drive time of around 10 minutes. It's approximately 6 kilometres away.

  • When travelling by public transport, expect a journey time of roughly 1 hour 30 minutes.

When to fly to Ontario International Airport (ONT)

  • August is the busiest month for flights from Charleston International Airport to Ontario International Airport. For a quieter experience, head to Ontario in May.

  • When booking your flight from Charleston International Airport to Ontario International Airport, think about the type of weather you like. August is the warmest month in Ontario, with temperatures ranging from 15ºC (59ºF) to 35ºC (95ºF).

  • Look for cheap tickets from CHS to ONT in January if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between 4ºC (39ºF) and 23ºC (73ºF) on average.

Explore more of United States

  • Los Angeles is just one of the many places in United States waiting to be explored after you've seen Ontario. Around 56 kilometres away to the west, its best attractions include Griffith Observatory, The Broad and La Brea Tar Pits & Museum.

  • Around 153 kilometres south of Ontario, San Diego is another favourite stop in United States. Experience the best of this destination with a visit to San Diego Zoo, USS Midway Museum and SeaWorld San Diego.

Plan the rest of your trip from Charleston to Ontario

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.