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281 € 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 290 €. Find the lowest prices on one-way and return tickets right here.
Ontario.281 € per passenger.Departing Tue, 29 Sep, returning Wed, 14 Oct.Return flight with Breeze Airways and Frontier Airlines.Outbound indirect flight with Breeze Airways, departs from Charleston on Tue, 29 Sep, arriving in Ontario International.Inbound indirect flight with Frontier Airlines, departs from Ontario International on Wed, 14 Oct, arriving in Charleston.Price includes taxes and charges.From 281 €, select.
Ontario.290 € per passenger.Departing Sat, 22 Aug, returning Sat, 29 Aug.Return flight with United.Outbound indirect flight with United, departs from Charleston on Sat, 22 Aug, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Sat, 29 Aug, arriving in Charleston.Price includes taxes and charges.From 290 €, select.
Ontario.290 € per passenger.Departing Wed, 21 Oct, returning Sat, 24 Oct.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Charleston on Wed, 21 Oct, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Sat, 24 Oct, arriving in Charleston.Price includes taxes and charges.From 290 €, select.
Ontario.291 € per passenger.Departing Wed, 2 Dec, returning Sat, 5 Dec.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Charleston on Wed, 2 Dec, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Sat, 5 Dec, arriving in Charleston.Price includes taxes and charges.From 291 €, select.
Ontario.291 € per passenger.Departing Fri, 30 Oct, returning Mon, 2 Nov.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Charleston on Fri, 30 Oct, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Mon, 2 Nov, arriving in Charleston.Price includes taxes and charges.From 291 €, select.
Ontario.291 € per passenger.Departing Sat, 24 Oct, returning Sat, 5 Dec.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Charleston on Sat, 24 Oct, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Sat, 5 Dec, arriving in Charleston.Price includes taxes and charges.From 291 €, select.
Ontario.291 € per passenger.Departing Wed, 23 Sep, returning Tue, 29 Sep.Return flight with United.Outbound indirect flight with United, departs from Charleston on Wed, 23 Sep, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Tue, 29 Sep, arriving in Charleston.Price includes taxes and charges.From 291 €, select.
Ontario.307 € per passenger.Departing Wed, 16 Dec, returning Thu, 7 Jan.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Charleston on Wed, 16 Dec, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Thu, 7 Jan, arriving in Charleston.Price includes taxes and charges.From 307 €, select.
Ontario.353 € per passenger.Departing Mon, 23 Nov, returning Fri, 27 Nov.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Charleston on Mon, 23 Nov, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Fri, 27 Nov, arriving in Charleston.Price includes taxes and charges.From 353 €, select.
Ontario.369 € per passenger.Departing Wed, 6 Jan, returning Sun, 10 Jan.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Charleston on Wed, 6 Jan, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Sun, 10 Jan, arriving in Charleston.Price includes taxes and charges.From 369 €, select.
Ontario.370 € per passenger.Departing Sat, 27 Feb, returning Thu, 4 Mar.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Charleston on Sat, 27 Feb, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Thu, 4 Mar, arriving in Charleston.Price includes taxes and charges.From 370 €, select.
Ontario.374 € per passenger.Departing Mon, 1 Mar, returning Tue, 9 Mar.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Charleston on Mon, 1 Mar, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Tue, 9 Mar, arriving in Charleston.Price includes taxes and charges.From 374 €, select.
Ontario.504 € per passenger.Departing Tue, 30 Mar, returning Fri, 2 Apr.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Charleston on Tue, 30 Mar, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Fri, 2 Apr, arriving in Charleston.Price includes taxes and charges.From 504 €, select.
Ontario.530 € per passenger.Departing Thu, 30 Jul, returning Mon, 3 Aug.Return flight with Breeze Airways and Frontier Airlines.Outbound indirect flight with Breeze Airways, departs from Charleston on Thu, 30 Jul, arriving in Ontario International.Inbound indirect flight with Frontier Airlines, departs from Ontario International on Mon, 3 Aug, arriving in Charleston.Price includes taxes and charges.From 530 €, select.
Ontario.853 € per passenger.Departing Wed, 19 May, returning Sat, 29 May.Return flight with Delta.Outbound indirect flight with Delta, departs from Charleston on Wed, 19 May, arriving in Ontario International.Inbound indirect flight with Delta, departs from Ontario International on Sat, 29 May, arriving in Charleston.Price includes taxes and charges.From 853 €, select.
Ontario.938 € per passenger.Departing Sat, 25 Jul, returning Fri, 31 Jul.Return flight with United.Outbound indirect flight with United, departs from Charleston on Sat, 25 Jul, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Fri, 31 Jul, arriving in Charleston.Price includes taxes and charges.From 938 €, 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.
Jul
from 938 €
Aug
from 290 €
Sep
from 291 €
Oct
from 290 €
Nov
from 353 €
Dec
from 291 €
Jan
from 369 €
Feb
Find prices
Mar
from 374 €
Apr
Find prices
May
from 853 €
Jun
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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 281 €
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San Bernardino Norton AFB

39km from central Ontario
from 526 €
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Santa Ana John Wayne

48km from central Ontario
from 266 €
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Long Beach Municipal

54km from central Ontario
from 264 €
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Hawthorne

65km from central Ontario
Search flights

Burbank

67km from central Ontario
from 280 €
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Los Angeles International

71km from central Ontario
Cheapest
from 181 €
Search flights

Charleston to Ontario: Flight information

The things to know before you go.
Cheapest flight found281 €
Cheapest month to flySeptember

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 281 €. 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 281 €.
As of July 2026, there are no flights flying from Charleston to Ontario International.
The cheapest month to fly from Charleston to Ontario International is usually September.
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 Tuesday, 29 September 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, Breeze Airways offers the cheapest flight tickets to Ontario International.

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

  • Ontario is three hours behind Charleston and follows the UTC-8 timezone.

  • To ensure you get on your CHS to ONT flight, leave plenty of time for things like check-in and baggage drop. Arriving two hours ahead of international departures and one hour before domestic flights is the general travel rule.

  • You'll likely experience longer lines during popular months such as July. Arriving up to four hours in advance for international flights and two hours for domestic departures will help ensure a smooth travel experience.

  • We make it a cinch to book a flight with a stopover. To see all your options for tickets from Charleston Airport to Ontario International Airport, deselect 'Direct flights only.' Then, choose a flight offering a stop long enough to tour your chosen city. Popular stopovers between CHS and ONT include:

    • Denver International Airport

    • Charlotte Douglas Airport

    • Houston George Bush Intercntl. Airport

Handy information about Charleston Airport (CHS)

  • When it comes to Charleston Airport's on-time performance, 79% of flights meet their scheduled arrival time.

  • Charleston Airport is around 19 kilometres from central Charleston. If you're ride-sharing, catching a taxi or driving from the centre, it'll take 25 minutes or so to arrive, depending on the traffic.

  • Taking public transport? Expect a journey time of around 50 minutes.

  • Need a handy hotel near CHS? If you've booked an early flight from Charleston Airport to Ontario International Airport, these stays will have you moments from your departure gate:

Arriving at Ontario International Airport (ONT)

Getting from Ontario International Airport (ONT) to central Ontario

  • You'll find ONT at 2900 E. Airport Drive.

  • Ontario International Airport to the centre of Ontario has a drive time of about 15 minutes. It's approximately 10 kilometres away.

  • Travelling to the centre on public transport takes about 45 minutes.

When to fly to Ontario International Airport (ONT)

  • The quietest month for a flight from Charleston Airport to Ontario International Airport is March, while July is the busiest. Pick the best time to go to Ontario based on whether you prefer a laid-back vibe or a more bustling atmosphere.

  • When reserving your flight from Charleston Airport to Ontario International Airport, consider the type of weather you like. August is the warmest month in Ontario, with temperatures ranging from 16ºC (61ºF) to 36ºC (97ºF).

  • February has average temperatures of between 4ºC (39ºF) and 24ºC (75ºF). Look for cheap tickets from CHS to ONT around that time if you like cooler conditions.

Explore more of the United States

  • You've done Ontario, now it's time to explore other corners of the United States. Journey about 56 kilometres west to Los Angeles to check off its must-visit sights. From Hollywood Sign to Universal Studios Hollywood and Hollywood Bowl, you'll have a full itinerary ahead.

  • If you want to check out another great destination in the United States, head for San Diego, about 153 kilometres south of Ontario. San Diego Zoo, San Diego Balboa Park and USS Midway Museum are highlights.

Plan the rest of your trip from Charleston to Ontario

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.