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Charleston

$136+ Cheap flights from Ontario to Charleston (ONT - CHS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CHS
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from Ontario to Charleston are usually found in January or February, booked 8 days in advance, depart on a Saturday or Tuesday and return on a Wednesday

Cheap flight deals from Ontario to Charleston

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Charleston (CHS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 14, 2025.

Round-trip from

$237
(American Airlines)

One-way from

$136
(American Airlines)

Popular in

April

Cheapest in

January

Average price

$360
From Ontario to Charleston
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One-way flight from Ontario to Charleston
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Highest demand for flights based on searches. 7% potential increase in price ($33 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Ontario to Charleston

Cheapest flights from Ontario to Charleston
Explore the most affordable flight options available from Ontario to Charleston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This American Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/912:45 pmONT - CHS
1 stop6h 59mAmerican Airlines
Tue 9/162:54 pmCHS - ONT
1 stop7h 00mAmerican Airlines
Deal found 8/12$237
This American Airlines deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1010:53 amONT - CHS
2 stops9h 44mAmerican Airlines
Wed 9/177:06 amCHS - ONT
2 stops11h 59mAmerican Airlines
Deal found 8/13$253
This American Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1310:57 amONT - CHS
1 stop8h 36mAmerican Airlines
Tue 12/169:28 amCHS - ONT
1 stop7h 15mAmerican Airlines
Deal found 8/14$254
This American Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/810:34 pmONT - CHS
1 stop6h 55mAmerican Airlines
Wed 11/126:39 amCHS - ONT
2 stops12h 22mAmerican Airlines
Deal found 8/14$259
This American Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1110:35 pmONT - CHS
1 stop8h 07mAmerican Airlines
Mon 9/155:36 pmCHS - ONT
1 stop6h 48mAmerican Airlines
Deal found 8/11$281
This American Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1212:45 pmONT - CHS
1 stop6h 59mAmerican Airlines
Mon 9/155:36 pmCHS - ONT
1 stop6h 48mAmerican Airlines
Deal found 8/12$282

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Charleston that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2025.
Use the filters below to find and compare flights from Ontario to Charleston that are best for you.

Fly from

Ontario

Fly to

Charleston

Route

Depart

Return

Price

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Wed 9/10

10:35 pm-8:32 am

1 stop6h 57m

Charleston

Wed 9/17

5:37 pm-9:24 pm

1 stop6h 47m

$237

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Tue 9/9

12:45 pm-10:44 pm

1 stop6h 59m

Charleston

Tue 9/16

2:54 pm-6:54 pm

1 stop7h 00m

$237

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Tue 9/23

10:35 pm-9:42 am

1 stop8h 07m

Charleston

Tue 9/30

5:37 pm-9:24 pm

1 stop6h 47m

$237

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Thu 9/11

10:35 pm-9:42 am

1 stop8h 07m

$136

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Sat 10/18

10:29 pm-8:16 am

1 stop6h 47m

$136

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Thu 9/4

10:53 am-10:44 pm

1 stop8h 51m

$136

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Fri 9/5

11:45 am-9:24 pm

1 stop6h 39m

$149

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Tue 9/2

11:45 am-9:24 pm

1 stop6h 39m

$149

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Wed 9/3

11:45 am-9:24 pm

1 stop6h 39m

$149

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Sat 9/6

11:45 am-11:51 pm

1 stop9h 06m

$149

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Best time to book a flight from Ontario to Charleston

Have a flexible travel schedule? Discover the best time to fly to Charleston from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Charleston

How far ahead should I book a flight from Ontario to Charleston?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Charleston. Price data was last updated on August 8, 2025.

To ensure you get the cheapest price possible for a flight from Ontario to Charleston, you should look to book at least 8 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Ontario to Charleston?

Currently, August is the cheapest month in which you can book a flight from Ontario to Charleston (average of $217). Flying from Ontario to Charleston in March is currently the most expensive (average of $335). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to CHS?

Find hourly flight availability from Ontario to Charleston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

One of the essential ways to save on airfare from Ontario to Charleston is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 5% on airfare.

Reviews of airlines servicing Charleston

Get insights into the airlines that provide service to Charleston. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Charleston. Reviews last updated August 14, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from Ontario to Charleston have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,244 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,980 reviews
Southwest
8.0
Very good
4,244 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,916 reviews
Southwest
8.0
Very good
4,244 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,244 reviews

Comfort

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Charleston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Ontario to Charleston round-trip?

    United Airlines, at $256, was found to be the cheapest airline from Ontario to Charleston.Alternate airlines to your destination round-trip include American Airlines and Delta. Users have found that United Airlines is 38% cheaper than the other options available to this destination.

  • Can I find deals for flights from Ontario to Charleston that include hotel bookings?

    Yes. In addition to deals on Ontario to Charleston flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Charleston?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Charleston.

  • Can I find deals for business class flights from Ontario to Charleston?

    Yes. Cheapflights offers flight deals from Ontario to Charleston by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Charleston?

    Currently, August is the cheapest month in which you can book a flight from Ontario to Charleston (average of $217). Flying from Ontario to Charleston in March is currently the most expensive (average of $335). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Charleston?

Book flights to Charleston if you plan to visit one of these locations
North Charleston
Summerville
Walterboro
Mount Pleasant
Isle of Palms
Santee
Edisto Beach

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from Ontario to Charleston

Discover the top 4 airlines that operate flights from Ontario to Charleston. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$256Average$379FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$270Average$390FlexibilityNo cancel feeOn-time71%
DeltaCheapest$296Average$352FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$341Average$412FlexibilityNo cancel feeOn-time63%

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