Cheap Flights from Ontario International to Charleston from $600

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Flight deals from Ontario International Airport to Charleston Airport

Looking for a cheap last-minute deal or the best return flight from Ontario International Airport to Charleston Airport? If you want to travel next month, return fares start from $600. Find the lowest prices on one-way and return tickets right here.

Charleston.$600 per passenger.Departing Wed, 1 Apr, returning Wed, 8 Apr.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Wed, 1 Apr, arriving in Charleston.Inbound indirect flight with Southwest Airlines, departs from Charleston on Wed, 8 Apr, arriving in Ontario International.Price includes taxes and charges.From $600, select.

Charleston.$619 per passenger.Departing Mon, 4 May, returning Tue, 12 May.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Mon, 4 May, arriving in Charleston.Inbound indirect flight with Southwest Airlines, departs from Charleston on Tue, 12 May, arriving in Ontario International.Price includes taxes and charges.From $619, select.

Charleston.$623 per passenger.Departing Tue, 28 Apr, returning Sat, 2 May.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Tue, 28 Apr, arriving in Charleston.Inbound indirect flight with Southwest Airlines, departs from Charleston on Sat, 2 May, arriving in Ontario International.Price includes taxes and charges.From $623, select.

Charleston.$631 per passenger.Departing Sat, 6 Jun, returning Tue, 9 Jun.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Sat, 6 Jun, arriving in Charleston.Inbound indirect flight with Southwest Airlines, departs from Charleston on Tue, 9 Jun, arriving in Ontario International.Price includes taxes and charges.From $631, select.

Charleston.$765 per passenger.Departing Thu, 28 May, returning Thu, 4 Jun.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Thu, 28 May, arriving in Charleston.Inbound indirect flight with Southwest Airlines, departs from Charleston on Thu, 4 Jun, arriving in Ontario International.Price includes taxes and charges.From $765, select.

Charleston.$769 per passenger.Departing Wed, 14 Oct, returning Wed, 21 Oct.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Wed, 14 Oct, arriving in Charleston.Inbound indirect flight with Southwest Airlines, departs from Charleston on Wed, 21 Oct, arriving in Ontario International.Price includes taxes and charges.From $769, select.

Charleston.$769 per passenger.Departing Thu, 17 Sep, returning Thu, 24 Sep.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Thu, 17 Sep, arriving in Charleston.Inbound indirect flight with Southwest Airlines, departs from Charleston on Thu, 24 Sep, arriving in Ontario International.Price includes taxes and charges.From $769, select.

Charleston.$769 per passenger.Departing Fri, 14 Aug, returning Sun, 16 Aug.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Fri, 14 Aug, arriving in Charleston.Inbound indirect flight with Southwest Airlines, departs from Charleston on Sun, 16 Aug, arriving in Ontario International.Price includes taxes and charges.From $769, select.

Charleston.$786 per passenger.Departing Mon, 23 Mar, returning Tue, 31 Mar.Return flight with Delta.Outbound indirect flight with Delta, departs from Ontario International on Mon, 23 Mar, arriving in Charleston.Inbound indirect flight with Delta, departs from Charleston on Tue, 31 Mar, arriving in Ontario International.Price includes taxes and charges.From $786, select.

Charleston.$795 per passenger.Departing Sat, 28 Mar, returning Wed, 1 Apr.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Sat, 28 Mar, arriving in Charleston.Inbound indirect flight with Southwest Airlines, departs from Charleston on Wed, 1 Apr, arriving in Ontario International.Price includes taxes and charges.From $795, select.

Charleston.$930 per passenger.Departing Fri, 3 Jul, returning Mon, 6 Jul.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Ontario International on Fri, 3 Jul, arriving in Charleston.Inbound indirect flight with Southwest Airlines, departs from Charleston on Mon, 6 Jul, arriving in Ontario International.Price includes taxes and charges.From $930, select.

Find the cheapest month to fly from Ontario International to Charleston

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

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Ontario International to Charleston: Alternative routes

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

Charleston

17km from central Charleston

ClosestCheapest

from $600

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Ontario to Charleston: Flight information

The things to know before you go.

Cheapest flight found	$600
Cheapest month to fly	April

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

How much are return flights from Ontario International to Charleston?

The best price we found for a return flight from Ontario International to Charleston is $600. 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 Ontario International to Charleston?

Currently, there are no airlines that fly direct from Ontario International to Charleston. But we found flights with one or more stops from $600.

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

As of March 2026, there are no flights flying from Ontario International to Charleston.

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

The cheapest month to fly from Ontario International to Charleston is usually April.

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

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ontario International Airport to Charleston Airport on Wednesday, 1 April 2026.

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

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

How can I find the best flight deal to Charleston?

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 Charleston 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.

When is the best time to book flights to Charleston?

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

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

Currently, Southwest Airlines offers the cheapest flight tickets to Charleston.

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

Charleston is three hours ahead of Ontario and is in the UTC-4 timezone.
To ensure you get on your ONT to CHS flight, leave plenty of time for things like baggage drop and finding your gate. Turning up two hours ahead of international departures and one hour before domestic flights is the general travel rule.
Travelling during a peak time like August? Public holidays and other popular seasons can lead to longer lines at check-in and security. Play it safe and arrive up to four hours before an international flight and two hours before domestic departures.
Think about adding a stopover when booking your ticket from Ontario International Airport to Charleston International Airport. Just uncheck 'Direct flights only' to break up your journey, or perhaps explore a new destination along the way. Check out these options between ONT and CHS:
- Dallas Love Field Airport
- Dallas/Fort Worth International Airport
- Hartsfield-Jackson Atlanta International Airport

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

$280 is currently the lowest price for a one-way Ontario International Airport to Charleston International Airport flight. Return flights start at $600. These fares can change based on demand.
To score cheap tickets from ONT to CHS, book early. Airlines generally offer their best fares when flights are first released.
The 'Whole month' tool shows you the cheapest flights from Ontario International Airport to Charleston International Airport throughout the entire month. It's an easy way to snap up a bargain if your travel plans are flexible.
There's no need to check every day to find out if fares have dropped when you create a Price Alert. We'll send you an update as soon as a special offer becomes available on cheap flights from ONT to CHS.
Tailor your flights with filters. Select your ideal arrival and departure times, total journey duration and airlines. You can also sort the results by 'Cheapest,' 'Best' or 'Fastest' flights from Ontario International Airport to Charleston International Airport.

Handy information about Ontario International Airport (ONT)

You'll find ONT at 2900 E. Airport Drive.
Ontario International Airport has an excellent on-time performance, making delays less likely. Departures from ONT land at their destination as scheduled 83.6% of the time.
Ontario International Airport is around 6 kilometres from central Ontario. If you're ride-sharing, catching a cab or driving from the centre, it'll take you 10 minutes or so to get there, depending on the traffic.
You can expect a trip time of roughly 1 hour 30 minutes when using public transport.
Searching for a convenient hotel near ONT? If you're catching an early flight from Ontario International Airport to Charleston International Airport, these stays will have you sleeping moments from your departure gate:

Arriving at Charleston International Airport (CHS)

If you're coming in on a late Ontario International Airport to Charleston International Airport flight, few things beat the convenience of being close to the terminal. Grab your bags from the carousel and then be resting not long after at one of these options near CHS:
Fast-track your adventure by picking up a Charleston International Airport rental car. Grab a set of wheels from Ace Rent a Car, Budget or Alamo and explore beyond Charleston's main sights.
Lock in the best rate by booking your vehicle from Charleston International Airport around one week before your departure date.

Getting from Charleston International Airport (CHS) to central Charleston

Charleston International Airport to the centre of Charleston has a drive time of around 30 minutes. It's approximately 21 kilometres away.
It'll take around 3 hours 35 minutes to get there by public transport.

When to fly to Charleston International Airport (CHS)

The quietest month for a flight from Ontario International Airport to Charleston International Airport is April, while July is the busiest. Pick the ideal time to visit Charleston based on whether you prefer a bustling atmosphere or a more laid-back vibe.
Before locking in your flight from Ontario International Airport to Charleston International Airport, consider the type of weather you enjoy. July is the warmest month in Charleston, with the temperature ranging from 24ºC to 32ºC.
Search for cheap tickets from ONT to CHS in January if you like travelling in cooler conditions. Temperatures are at their lowest then, ranging between 4ºC and 17ºC on average.

Explore more of United States

Charleston has plenty going for it, but there are so many other parts of United States just waiting to be discovered. About 322 kilometres south-west of Charleston, a visit to Jacksonville will keep your itinerary busy. Start with leading sights like Jacksonville Zoo and Gardens, The Cummer Museum of Art & Gardens and Friendship Fountain.
If you want to check out another great destination in United States, consider Charlotte, roughly 290 kilometres north of Charleston. NASCAR Hall of Fame, Freedom Park and Carolinas Aviation Museum are among the biggest draws.