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$209+ Cheap flights from Charleston to Ontario (CHS - ONT)

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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
CHS — ONT
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Charleston to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Charleston (CHS) to Ontario (ONT). 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 September 15, 2025.

Round-trip from

$363
(American Airlines)

One-way from

$209
(United Airlines)

Popular in

April

Cheapest in

February

Average price

$315
From Charleston to Ontario
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One-way flight from Charleston to Ontario
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Highest demand for flights based on searches. 13% potential increase in price ($64 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Charleston to Ontario

Cheapest flights from Charleston to Ontario
Explore the most affordable flight options available from Charleston to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This American Airlines deal was found by Cheapflights users on 9/15. 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 11/57:00 amCHS - ONT
1 stop10h 02mAmerican Airlines
Thu 11/67:30 pmONT - CHS
2 stops10h 12mAmerican Airlines
Deal found 9/15$363
This Delta deal was found by Cheapflights users on 9/15. 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 11/64:24 pmCHS - ONT
1 stop8h 58mDelta
Sun 11/910:25 pmONT - CHS
1 stop8h 06mDelta
Deal found 9/15$387
This Southwest deal was found by Cheapflights users on 9/15. 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 11/51:00 pmCHS - ONT
1 stop8h 40mSouthwest
Thu 11/61:05 pmONT - CHS
1 stop7h 25mSouthwest
Deal found 9/15$391
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 12/97:24 pmCHS - ONT
1 stop26h 08mAlaska Airlines
Tue 12/166:00 amONT - CHS
1 stop9h 24mAlaska Airlines
Deal found 9/15$402
This Alaska Airlines deal was found by Cheapflights users on 9/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/177:23 pmCHS - ONT
1 stop20h 14mAlaska Airlines
Tue 10/217:43 pmONT - CHS
1 stop19h 34mAlaska Airlines
Deal found 9/14$422
This Alaska Airlines deal was found by Cheapflights users on 9/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/47:24 pmCHS - ONT
1 stop31h 05mAlaska Airlines
Wed 12/106:00 amONT - CHS
1 stop9h 24mAlaska Airlines
Deal found 9/14$432
This United Airlines deal was found by Cheapflights users on 9/15. 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 11/194:11 pmCHS - ONT
1 stop7h 33mUnited Airlines
Thu 11/275:05 amONT - CHS
1 stop7h 01mUnited Airlines
Deal found 9/15$434
This Alaska Airlines deal was found by Cheapflights users on 9/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/177:24 pmCHS - ONT
1 stop31h 50mAlaska Airlines
Sat 1/1011:30 amONT - CHS
1 stop27h 01mAlaska Airlines
Deal found 9/14$443
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 11/146:59 pmCHS - ONT
1 stop28h 54mAlaska Airlines
Sun 11/166:00 amONT - CHS
1 stop8h 54mAlaska Airlines
Deal found 9/15$452
This Alaska Airlines deal was found by Cheapflights users on 9/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/177:24 pmCHS - ONT
1 stop31h 50mAlaska Airlines
Thu 1/811:30 amONT - CHS
1 stop27h 01mAlaska Airlines
Deal found 9/14$453
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 11/76:59 pmCHS - ONT
1 stop28h 54mAlaska Airlines
Mon 11/106:00 amONT - CHS
1 stop8h 54mAlaska Airlines
Deal found 9/15$462

Cheapflights Fare Finder

 
Customize your flight search to find flights from Charleston to Ontario 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 September 15, 2025.
Use the filters below to find and compare flights from Charleston to Ontario that are best for you.

Fly from

Charleston

Fly to

Ontario

Route

Depart

Return

Price

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Wed 11/5

7:00 am-2:02 pm

1 stop10h 02m

Ontario

Thu 11/6

7:30 pm-8:42 am

2 stops10h 12m

$363

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Thu 11/6

4:24 pm-10:22 pm

1 stop8h 58m

Ontario

Sun 11/9

10:25 pm-9:31 am

1 stop8h 06m

$387

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Wed 11/5

1:00 pm-6:40 pm

1 stop8h 40m

Ontario

Thu 11/6

1:05 pm-11:30 pm

1 stop7h 25m

$391

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Fri 10/17

7:23 pm-12:37 pm

1 stop20h 14m

Ontario

Tue 10/21

7:43 pm-6:17 pm

1 stop19h 34m

$422

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Thu 12/4

7:24 pm-11:29 pm

1 stop31h 05m

Ontario

Wed 12/10

6:00 am-6:24 pm

1 stop9h 24m

$432

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Wed 11/19

4:11 pm-8:44 pm

1 stop7h 33m

Ontario

Thu 11/27

5:05 am-3:06 pm

1 stop7h 01m

$434

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Wed 12/17

7:24 pm-12:14 am

1 stop31h 50m

Ontario

Sat 1/10

11:30 am-5:31 pm

1 stop27h 01m

$443

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Fri 11/14

6:59 pm-8:53 pm

1 stop28h 54m

Ontario

Sun 11/16

6:00 am-5:54 pm

1 stop8h 54m

$452

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Wed 12/17

7:24 pm-12:14 am

1 stop31h 50m

Ontario

Thu 1/8

11:30 am-5:31 pm

1 stop27h 01m

$453

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Fri 11/7

6:59 pm-8:53 pm

1 stop28h 54m

Ontario

Mon 11/10

6:00 am-5:54 pm

1 stop8h 54m

$462

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 21 results
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Best time to book a flight from Charleston to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Charleston 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 Charleston to Ontario

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

Currently, August is the cheapest month in which you can book a flight from Charleston to Ontario (average of $246). Flying from Charleston to Ontario in March is currently the most expensive (average of $328). 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 CHS to ONT?

Find hourly flight availability from Charleston to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

It’s typically best to fly out from Charleston to Ontario in the morning. Doing so could potentially save you 34% on the flight price compared to flying at noon, which is usually more expensive.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated September 15, 2025.
Read reviews from past customers who have flown Delta and American Airlines from Charleston to Ontario. 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.
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,954 reviews
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,954 reviews

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Charleston to Ontario. 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 Charleston to Ontario?

    A quick flight from Charleston to Ontario can take about 8h 40m. American Airlines provides one of the quickest options available for as low as $391. The distance from Charleston to Ontario is about 2152 mi. This flight may include one or multiple stops.

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

    Flying on American Airlines is currently your cheapest option to Ontario, with prices starting at $267. Another option worth looking into is Delta, starting at $296 round trip. American Airlines is currently priced 34% below the average price you’ll pay for this route.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Charleston to Ontario 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 Charleston to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Charleston to Ontario (average of $246). Flying from Charleston to Ontario in March is currently the most expensive (average of $328). 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

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Alternative routes for Charleston to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Charleston to Ontario

Discover the top 2 airlines that operate flights from Charleston to Ontario. 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$267Average$392FlexibilityNo cancel feeOn-time71%
DeltaCheapest$296Average$332FlexibilityNo cancel feeOn-timeN/A

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