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Charleston

$149+ 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 1/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CHS
Dec 4 — Dec 111
Thu 12/4
Thu 12/11
1 adult, Economy
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Find cheap flights from Ontario to Charleston with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

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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 November 4, 2025.

This American Airlines deal was found by Cheapflights users on 11/2. 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 12/310:47 amONT - CHS
1 stop8h 25mAmerican Airlines
Sat 12/132:26 pmCHS - ONT
1 stop9h 41mAmerican Airlines
Deal found 11/2$287
This United Airlines deal was found by Cheapflights users on 11/2. 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 12/36:41 pmONT - CHS
2 stops13h 05mUnited Airlines
Sat 12/134:11 pmCHS - ONT
1 stop7h 31mUnited Airlines
Deal found 11/2$292
This Alaska Airlines deal was found by Cheapflights users on 11/3. 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.
Wed 12/36:00 amONT - CHS
1 stop9h 24mAlaska Airlines
Sat 12/67:24 pmCHS - ONT
1 stop31h 05mAlaska Airlines
Deal found 11/3$324
This American Airlines deal was found by Cheapflights users on 11/2. 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.
Mon 12/110:34 pmONT - CHS
1 stop8h 12mAmerican Airlines
Sun 12/74:18 pmCHS - ONT
1 stop7h 49mAmerican Airlines
Deal found 11/2$333
This Alaska Airlines deal was found by Cheapflights users on 11/3. 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
Sun 12/77:24 pmCHS - ONT
1 stop18h 55mAlaska Airlines
Deal found 11/3$344
This American Airlines deal was found by Cheapflights users on 11/2. 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 12/210:34 pmONT - CHS
1 stop8h 16mAmerican Airlines
Mon 1/57:00 amCHS - ONT
1 stop7h 53mAmerican Airlines
Deal found 11/2$362
This Alaska Airlines deal was found by Cheapflights users on 11/3. 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.
Thu 12/46:00 amONT - CHS
1 stop9h 24mAlaska Airlines
Sun 12/77:24 pmCHS - ONT
1 stop31h 05mAlaska Airlines
Deal found 11/3$364
This Delta deal was found by Cheapflights users on 11/2. 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.
Thu 12/2511:15 amONT - CHS
1 stop6h 24mDelta
Tue 12/305:30 amCHS - ONT
1 stop7h 30mDelta
Deal found 11/2$369

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 November 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$287
(American Airlines)

One-way from

$149
(United Airlines)

Popular in

December

Cheapest in

August

Average price

$477
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 ($22 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 4, 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

Sun 12/7

5:05 am-3:09 pm

1 stop7h 04m

Charleston

Wed 12/10

4:11 pm-8:42 pm

1 stop7h 31m

$287

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Mon 2/23

6:30 am-5:45 pm

1 stop8h 15m

Charleston

Thu 2/26

1:00 pm-6:05 pm

1 stop8h 05m

$287

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Wed 12/3

6:41 pm-10:46 am

2 stops13h 05m

Charleston

Sat 12/13

4:11 pm-8:42 pm

1 stop7h 31m

$292

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Thu 1/15

7:30 pm-9:48 am

2 stops11h 18m

Charleston

Mon 1/19

12:29 pm-6:20 pm

2 stops8h 51m

$317

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Wed 12/10

6:00 am-6:24 pm

1 stop9h 24m

Charleston

Sun 12/14

7:24 pm-11:29 pm

1 stop31h 05m

$344

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Fri 12/5

7:33 pm-6:24 pm

1 stop19h 51m

Charleston

Sun 12/7

7:24 pm-11:19 am

1 stop18h 55m

$344

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Mon 3/2

10:20 pm-9:24 am

1 stop8h 04m

Charleston

Tue 3/10

5:30 am-11:38 am

1 stop9h 08m

$367

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Wed 3/4

10:20 pm-9:24 am

1 stop8h 04m

Charleston

Tue 3/10

5:30 am-11:38 am

1 stop9h 08m

$367

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Wed 3/4

10:20 pm-9:24 am

1 stop8h 04m

Charleston

Thu 3/12

5:30 am-11:38 am

1 stop9h 08m

$367

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Mon 3/2

10:20 pm-9:24 am

1 stop8h 04m

Charleston

Sat 3/7

6:30 am-11:59 am

1 stop8h 29m

$367

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

Showing 1-10 of 24 results
1
2
3

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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Charleston flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 31, 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 $273). 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 November 4, 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 November 4, 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

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

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

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

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
8,003 reviews
Southwest
8.0
Very good
4,239 reviews

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

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
9,002 reviews
Southwest
8.0
Very good
4,239 reviews

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

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
11,040 reviews
Southwest
8.0
Very good
4,239 reviews

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

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 $287, United Airlines can have you in Charleston from Ontario in 7h 04m. 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 $149 on Delta. Other airlines that offer cheap prices include United Airlines from $149 and Alaska Airlines from $163 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 $273). 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 November 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$256Average$436FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$270Average$416FlexibilityNo cancel feeOn-time71%
DeltaCheapest$296Average$356FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$359Average$407FlexibilityNo cancel feeOn-time63%

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