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Charleston

$111+ 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 10/30. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CHS
Nov 19 — Nov 261
Wed 11/19
Wed 11/26
1 adult, Economy
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Find cheap flights from Ontario to Charleston with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Ontario to Charleston are usually found in August or January, booked 8 days in advance, depart on a Saturday or Tuesday and return on a Wednesday

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 October 20, 2025.

This Southwest deal was found by Cheapflights users on 10/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1110:30 amONT - CHS
1 stop7h 45mSouthwest
Mon 12/157:00 amCHS - ONT
2 stops10h 40mSouthwest
Deal found 10/19$278
This Southwest deal was found by Cheapflights users on 10/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/210:30 amONT - CHS
1 stop7h 45mSouthwest
Sat 12/66:10 amCHS - ONT
1 stop7h 35mSouthwest
Deal found 10/19$295
This Delta deal was found by Cheapflights users on 10/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2411:15 amONT - CHS
1 stop6h 24mDelta
Thu 12/255:30 amCHS - ONT
1 stop7h 30mDelta
Deal found 10/19$297
This Southwest deal was found by Cheapflights users on 10/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/181:05 pmONT - CHS
1 stop7h 25mSouthwest
Mon 12/224:30 pmCHS - ONT
1 stop7h 10mSouthwest
Deal found 10/19$308
This Southwest deal was found by Cheapflights users on 10/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1210:30 amONT - CHS
1 stop7h 45mSouthwest
Sat 11/156:10 amCHS - ONT
1 stop7h 35mSouthwest
Deal found 10/19$337
This American Airlines deal was found by Cheapflights users on 10/18. 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 12/612:46 pmONT - CHS
1 stop6h 26mAmerican Airlines
Sat 12/134:15 pmCHS - ONT
1 stop7h 52mAmerican Airlines
Deal found 10/18$338
This Alaska Airlines deal was found by Cheapflights users on 10/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/57:33 pmONT - CHS
1 stop19h 51mAlaska Airlines
Wed 12/107:24 pmCHS - ONT
1 stop18h 55mAlaska Airlines
Deal found 10/18$344
This United Airlines deal was found by Cheapflights users on 10/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/126:38 pmONT - CHS
2 stops12h 30mUnited Airlines
Sat 11/156:15 amCHS - ONT
2 stops9h 18mUnited Airlines
Deal found 10/19$347

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 October 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$278
(Southwest)

One-way from

$111
(Frontier)

Popular in

April

Cheapest in

August

Average price

$525
Provider with most accurate pricing for Ontario-Charleston flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Charleston flights.
Search Deals
From Ontario to Charleston
Search Deals
One-way flight from Ontario to Charleston
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 20, 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

Thu 12/18

8:25 am-7:40 pm

2 stops8h 15m

Charleston

Mon 12/22

4:30 pm-8:40 pm

1 stop7h 10m

$313

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Thu 12/11

10:30 am-9:15 pm

1 stop7h 45m

Charleston

Mon 12/15

8:25 am-7:15 pm

1 stop13h 50m

$330

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Thu 12/4

10:25 pm-9:27 am

1 stop8h 02m

Charleston

Sat 12/6

5:00 pm-10:05 pm

1 stop8h 05m

$337

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Fri 12/5

7:33 pm-6:24 pm

1 stop19h 51m

Charleston

Wed 12/10

7:24 pm-11:19 am

1 stop18h 55m

$344

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Wed 11/12

6:38 pm-10:08 am

2 stops12h 30m

Charleston

Sat 11/15

6:15 am-12:33 pm

2 stops9h 18m

$347

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Tue 12/2

9:59 am-12:03 am

2 stops11h 04m

Charleston

Sat 12/6

5:10 am-11:53 am

2 stops9h 43m

$347

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Wed 12/3

6:00 am-6:24 pm

1 stop9h 24m

Charleston

Mon 12/8

7:24 pm-6:33 pm

1 stop26h 09m

$364

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Tue 11/11

10:30 am-9:15 pm

1 stop7h 45m

Charleston

Tue 11/25

5:10 am-3:40 pm

1 stop13h 30m

$392

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Wed 12/17

10:25 pm-9:27 am

1 stop8h 02m

Charleston

Thu 1/1

6:00 am-10:05 am

1 stop7h 05m

$394

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Wed 12/24

11:15 am-8:39 pm

1 stop6h 24m

Charleston

Fri 12/26

5:30 am-10:00 am

1 stop7h 30m

$397

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/17

Showing 1-10 of 24 results
1
2
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Compare providers for flights from Ontario to Charleston

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Charleston in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Charleston flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Charleston flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Charleston flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Charleston flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Charleston flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 October 17, 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, October is the cheapest month in which you can book a flight from Ontario to Charleston (average of $117). Flying from Ontario to Charleston in February is currently the most expensive (average of $276). 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 October 20, 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 18% 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 October 20, 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
4,239 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

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
4,239 reviews
Southwest
8.0
Very good
4,239 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

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
7.9
Good
7,978 reviews
Southwest
8.0
Very good
4,239 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

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
8,991 reviews
Southwest
8.0
Very good
4,239 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

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
11,024 reviews
Southwest
8.0
Very good
4,239 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

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.

  • How long is the flight from Ontario to Charleston?

    For as low as $337, Southwest can have you in Charleston from Ontario in 8h 02m. Airlines will cover a distance of 2152 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 40% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Ontario to Charleston one-way?

    One-way options have recently been found by users for as low as $111 on Frontier. Other airlines that offer cheap prices include Southwest from $130 and Delta from $149 one-way.

  • 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, October is the cheapest month in which you can book a flight from Ontario to Charleston (average of $117). Flying from Ontario to Charleston in February is currently the most expensive (average of $276). 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
Isle of Palms
Santee
Mount Pleasant
Edisto Beach

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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 October 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$256Average$433FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$270Average$401FlexibilityNo cancel feeOn-time71%
DeltaCheapest$296Average$357FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$359Average$407FlexibilityNo cancel feeOn-time63%

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