HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$160+ 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 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
CHS — ONT
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Charleston to Ontario 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”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 July 3, 2025.

Round-trip from

$319
(Delta)

One-way from

$160
(Delta)

Popular in

April

Cheapest in

February

Average price

$391
From Charleston to Ontario
Search Deals
One-way flight from Charleston to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($57 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

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 July 3, 2025.

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 7/305:14 pmCHS - ONT
1 stop8h 13mDelta
Wed 8/610:05 pmONT - CHS
1 stop7h 41mDelta
Deal found 6/30$319
This American Airlines deal was found by Cheapflights users on 7/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/255:33 pmCHS - ONT
1 stop6h 39mAmerican Airlines
Mon 9/112:47 pmONT - CHS
1 stop7h 08mAmerican Airlines
Deal found 7/3$342
This Southwest deal was found by Cheapflights users on 7/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/44:15 pmCHS - ONT
1 stop7h 55mSouthwest
Fri 10/1712:55 pmONT - CHS
1 stop8h 30mSouthwest
Deal found 7/3$362
This United Airlines deal was found by Cheapflights users on 7/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/73:51 pmCHS - ONT
1 stop9h 15mUnited Airlines
Tue 8/126:00 amONT - CHS
1 stop7h 07mUnited Airlines
Deal found 7/3$443
This Alaska Airlines deal was found by Cheapflights users on 7/1. 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.
Mon 9/86:17 pmCHS - ONT
2 stops18h 09mAlaska Airlines
Sun 11/96:00 amONT - CHS
1 stop8h 54mAlaska Airlines
Deal found 7/1$445

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 July 3, 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 7/30

5:14 pm-10:27 pm

1 stop8h 13m

Ontario

Wed 8/6

10:05 pm-8:46 am

1 stop7h 41m

$319

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Mon 8/25

5:33 pm-9:12 pm

1 stop6h 39m

Ontario

Mon 9/1

12:47 pm-10:55 pm

1 stop7h 08m

$342

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Sat 10/4

4:15 pm-9:10 pm

1 stop7h 55m

Ontario

Fri 10/17

12:55 pm-12:25 am

1 stop8h 30m

$362

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Thu 8/7

3:51 pm-10:06 pm

1 stop9h 15m

Ontario

Tue 8/12

6:00 am-4:07 pm

1 stop7h 07m

$443

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Mon 9/8

6:17 pm-9:26 am

2 stops18h 09m

Ontario

Sun 11/9

6:00 am-5:54 pm

1 stop8h 54m

$445

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Sat 8/23

6:20 am-10:35 am

1 stop7h 15m

$160

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Wed 10/22

8:20 am-3:30 pm

2 stops10h 10m

$165

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Sat 8/30

4:15 pm-8:43 pm

1 stop7h 28m

$210

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Tue 8/19

1:44 pm-12:15 am

2 stops13h 31m

$215

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Mon 7/21

9:05 am-11:50 pm

2 stops17h 45m

$256

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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 July 3, 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 July 3, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.1

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

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.1

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
4,266 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.1

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
7,982 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.1

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
8,861 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Entertainment

7.1

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 Charleston to Ontario. 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 Charleston to Ontario round-trip?

    Flying on Delta is currently your cheapest option to Ontario, with prices starting at $319. Additional round-trip tickets that might be worth considering are offered by American Airlines and Southwest, with the lowest prices starting at $342 and $362, respectively. Delta is currently priced 22% below the average price you’ll pay for this route.

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

    $160 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $165 and $210, respectively.

  • 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Charleston to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Charlotte to Las Vegas flights
Charlotte to San Francisco flights
Charlotte to Los Angeles flights
Charleston to Las Vegas flights
Charlotte to Santa Ana flights
Charlotte to San Diego flights
Charlotte to Ontario flights
Columbia to Las Vegas flights
Greenville to Las Vegas flights
Savannah to Las Vegas flights
Myrtle Beach to Las Vegas flights
Charlotte to Sacramento flights
Charlotte to Burbank flights
Charleston to San Francisco flights
Greenville to Los Angeles flights
Savannah to Los Angeles flights
Augusta to Las Vegas flights
Charleston to Los Angeles flights
Greenville to Santa Ana flights
Charleston to San Diego flights
Greenville to Ontario flights
Columbia to San Francisco flights
Columbia to Los Angeles flights
Charlotte to Reno flights
Myrtle Beach to Los Angeles flights
Charlotte to San Jose flights
Savannah to Ontario flights
Greenville to San Francisco flights
Charlotte to Oakland flights
Greenville to Burbank flights
Columbia to San Diego flights
Greenville to San Diego flights
Savannah to San Francisco flights
Charlotte to Palm Springs flights
Columbia to Ontario flights
Charleston to Reno flights
Savannah to Santa Ana flights
Charleston to Santa Ana flights
Charlotte to Santa Barbara flights
Savannah to San Diego flights
Charlotte to Fresno flights
Myrtle Beach to San Francisco flights
Augusta to Los Angeles flights
Myrtle Beach to Ontario flights
Charlotte to Long Beach flights
Charleston to Sacramento flights
Greenville to San Jose flights
Myrtle Beach to Reno flights
Myrtle Beach to Santa Ana flights

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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$270Average$421FlexibilityNo cancel feeOn-time71%
DeltaCheapest$296Average$332FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.