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Charleston

$156+ 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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CHS
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
1 adult, Economy
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Cheapflights Tip: The best prices from Ontario to Charleston are usually found in January or September, 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 July 1, 2025.

Round-trip from

$308
(Delta)

One-way from

$156
(JetBlue)

Popular in

November

Cheapest in

January

Average price

$407
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. 18% potential increase in price ($99 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 1, 2025.

This American Airlines deal was found by Cheapflights users on 6/29. 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 8/2712:46 pmONT - CHS
1 stop6h 16mAmerican Airlines
Sun 8/317:06 amCHS - ONT
1 stop7h 47mAmerican Airlines
Deal found 6/29$295
This Delta deal was found by Cheapflights users on 6/30. 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 8/2711:45 amONT - CHS
1 stop9h 06mDelta
Sun 8/316:20 amCHS - ONT
1 stop7h 00mDelta
Deal found 6/30$308
This Alaska Airlines deal was found by Cheapflights users on 6/30. 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.
Tue 8/192:21 pmONT - CHS
1 stop23h 56mAlaska Airlines
Tue 8/266:17 pmCHS - ONT
1 stop19h 27mAlaska Airlines
Deal found 6/30$318
This United Airlines deal was found by Cheapflights users on 6/30. 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.
Tue 8/195:10 amONT - CHS
2 stops10h 58mUnited Airlines
Tue 8/264:34 pmCHS - ONT
1 stop8h 56mUnited Airlines
Deal found 6/30$324
This Southwest deal was found by Cheapflights users on 6/29. 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 11/138:25 pmONT - CHS
2 stops10h 35mSouthwest
Mon 11/178:25 amCHS - ONT
2 stops9h 25mSouthwest
Deal found 6/29$399

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 July 1, 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 8/27

12:46 pm-10:02 pm

1 stop6h 16m

Charleston

Sun 8/31

7:06 am-11:53 am

1 stop7h 47m

$295

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Wed 8/27

11:45 am-11:51 pm

1 stop9h 06m

Charleston

Sun 8/31

6:20 am-10:20 am

1 stop7h 00m

$308

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Tue 8/19

2:21 pm-5:17 pm

1 stop23h 56m

Charleston

Tue 8/26

6:17 pm-10:44 am

1 stop19h 27m

$318

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Tue 8/19

5:10 am-7:08 pm

2 stops10h 58m

Charleston

Tue 8/26

4:34 pm-10:30 pm

1 stop8h 56m

$324

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Fri 9/5

10:56 pm-10:25 am

1 stop8h 29m

$156

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Sat 8/2

11:40 am-9:24 pm

1 stop6h 44m

$160

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Thu 9/4

7:00 am-7:08 pm

1 stop9h 08m

$172

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Tue 8/19

10:03 am-5:17 pm

2 stops28h 14m

$212

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Wed 8/13

6:10 am-6:50 pm

2 stops9h 40m

$215

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

Thu 8/21

5:09 pm-12:11 pm

2 stops16h 02m

$241

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

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 June 27, 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 July 1, 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 July 1, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,275 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,974 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,858 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
JetBlue
7.3
Good
2,919 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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?

    Delta, at $308, was found to be the cheapest airline from Ontario to Charleston.Alternate airlines to your destination round-trip include Alaska Airlines and United Airlines. Users have found that Delta is 29% 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 $156 on JetBlue. Other airlines that offer cheap prices include Delta from $160 and United Airlines from $172 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, 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 Ontario?

Book flights to Ontario if you plan to visit one of these locations
North Charleston
Summerville
Walterboro
Mount Pleasant
Isle of Palms
Folly Beach
Santee
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 July 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$256Average$379FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$270Average$410FlexibilityNo cancel feeOn-time71%
DeltaCheapest$296Average$352FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$341Average$407FlexibilityNo cancel feeOn-time63%

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