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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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — CHS
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$297
(Delta)

One-way from

$149
(Delta)

Popular in

November

Cheapest in

January

Average price

$406
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 ($18 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This Delta deal was found by Cheapflights users on 6/10. 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.
mié. 10/812:00 pmONT - CHS
1 stop8h 41mDelta
jue. 10/164:30 pmCHS - ONT
1 stop9h 11mDelta
Deal found 6/10$297
This American Airlines deal was found by Cheapflights users on 6/11. 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.
mié. 10/810:33 amONT - CHS
2 stops9h 16mAmerican Airlines
mar. 10/147:46 pmCHS - ONT
1 stop7h 16mAmerican Airlines
Deal found 6/11$302
This Southwest deal was found by Cheapflights users on 6/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/295:45 amONT - CHS
1 stop7h 20mSouthwest
sáb. 8/96:00 amCHS - ONT
1 stop9h 30mSouthwest
Deal found 6/11$347
This United Airlines deal was found by Cheapflights users on 6/10. 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.
mar. 7/15:05 amONT - CHS
1 stop7h 16mUnited Airlines
vie. 7/44:27 pmCHS - ONT
1 stop7h 27mUnited Airlines
Deal found 6/10$371
This Alaska Airlines deal was found by Cheapflights users on 6/9. 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.
sáb. 9/206:00 amONT - CHS
1 stop8h 40mAlaska Airlines
sáb. 10/117:14 pmCHS - ONT
1 stop20h 23mAlaska Airlines
Deal found 6/9$428

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 junio 12, 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

mié. 10/8

12:00 pm-11:41 pm

1 stop8h 41m

Charleston

mié. 10/15

4:30 pm-10:41 pm

1 stop9h 11m

$297

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

mié. 10/8

10:33 am-10:49 pm

2 stops9h 16m

Charleston

mar. 10/14

7:46 pm-12:02 am

1 stop7h 16m

$302

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

mar. 7/29

5:45 am-4:05 pm

1 stop7h 20m

Charleston

sáb. 8/9

6:00 am-12:30 pm

1 stop9h 30m

$347

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

mar. 7/1

5:05 am-3:21 pm

1 stop7h 16m

Charleston

vie. 7/4

4:27 pm-8:54 pm

1 stop7h 27m

$371

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

sáb. 9/20

6:00 am-5:40 pm

1 stop8h 40m

Charleston

sáb. 10/11

7:14 pm-12:37 pm

1 stop20h 23m

$428

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

mar. 8/26

11:45 am-9:24 pm

1 stop6h 39m

$149

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

lun. 9/22

10:56 pm-10:25 am

1 stop8h 29m

$156

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

lun. 8/25

5:10 am-3:10 pm

1 stop7h 00m

$199

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

mar. 8/26

10:50 am-11:03 pm

2 stops9h 13m

$206

OntarioCharleston

ONT - CHS

ONTCHS

Ontario

mar. 8/12

7:30 am-10:02 pm

2 stops11h 32m

$215

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 11 results
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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 9, 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 junio 12, 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.

Rainfall in Charleston by month

Plan your trip to Charleston by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Charleston ranges from 2.4 - 7.2 inches per month. August is typically the wettest month, when rainfall can reach 7.2 in. November is typically the driest time to visit Charleston when rainfall is around 2.4 in.

Temperature in Charleston by month

Plan your trip to Charleston by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Charleston, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

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 junio 12, 2025.
To help decide which airline to fly from Ontario to Charleston, see what other customers have to say about Alaska Airlines, Southwest and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

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

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

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
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

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
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

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
2,925 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

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 $297, was found to be the cheapest airline from Ontario to Charleston.Alternate airlines to your destination round-trip include American Airlines and Southwest. Users have found that Delta is 32% 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 JetBlue from $156 and United Airlines from $199 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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Alternative routes for Ontario to Charleston

See prices for flight routes from nearby airports that may be better suited for you.
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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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$256Average$397FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$270Average$408FlexibilityNo cancel feeOn-time71%
DeltaCheapest$296Average$351FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$341Average$417FlexibilityNo cancel feeOn-time63%

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