HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$166+ 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 7/30. Fares are subject to change and may not be available on all flights or dates of travel.
CHS — ONT
Jun 2 — Jun 91
Mon 6/2
Mon 6/9
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 May 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$331
(American Airlines)

One-way from

$166
(United Airlines)

Popular in

April

Cheapest in

February

Average price

$363
Provider with most accurate pricing for Charleston-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Charleston-Ontario flights.
Search Deals
From Charleston to Ontario
Search Deals
One-way flight from Charleston to Ontario
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($52 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 28, 2025.

This American Airlines deal was found by Cheapflights users on 5/28. 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 7/156:02 pmCHS - ONT
1 stop6h 36mAmerican Airlines
Tue 7/2210:28 pmONT - CHS
1 stop6h 58mAmerican Airlines
Deal found 5/28$331
This United Airlines deal was found by Cheapflights users on 5/28. 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.
Fri 7/411:25 amCHS - ONT
1 stop10h 05mUnited Airlines
Wed 7/95:05 amONT - CHS
1 stop7h 16mUnited Airlines
Deal found 5/28$401
This Southwest deal was found by Cheapflights users on 5/27. 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 6/264:15 pmCHS - ONT
2 stops10h 40mSouthwest
Thu 7/39:20 pmONT - CHS
1 stop9h 55mSouthwest
Deal found 5/27$422
This Alaska Airlines deal was found by Cheapflights users on 5/27. 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 8/222:40 pmCHS - ONT
2 stops12h 19mAlaska Airlines
Mon 8/257:22 pmONT - CHS
2 stops15h 28mAlaska Airlines
Deal found 5/27$484
This JetBlue deal was found by Cheapflights users on 5/28. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/1611:00 amCHS - ONT
1 stop13h 59mJetBlue
Mon 6/2311:59 pmONT - CHS
1 stop15h 05mJetBlue
Deal found 5/28$507

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 May 28, 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

Tue 7/15

6:02 pm-9:38 pm

1 stop6h 36m

Ontario

Tue 7/22

10:28 pm-8:26 am

1 stop6h 58m

$331

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Fri 7/4

11:25 am-6:30 pm

1 stop10h 05m

Ontario

Wed 7/9

5:05 am-3:21 pm

1 stop7h 16m

$401

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Thu 6/26

4:15 pm-11:55 pm

2 stops10h 40m

Ontario

Thu 7/3

9:20 pm-10:15 am

1 stop9h 55m

$422

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Fri 8/22

2:40 pm-11:59 pm

2 stops12h 19m

Ontario

Mon 8/25

7:22 pm-1:50 pm

2 stops15h 28m

$484

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Mon 6/16

11:00 am-9:59 pm

1 stop13h 59m

Ontario

Mon 6/23

11:59 pm-6:04 pm

1 stop15h 05m

$507

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Wed 7/30

3:51 pm-10:06 pm

1 stop9h 15m

$166

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Wed 7/30

2:01 pm-9:38 pm

2 stops10h 37m

$171

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Mon 8/18

4:44 pm-10:20 pm

1 stop8h 36m

$180

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Tue 8/26

6:17 pm-2:09 pm

1 stop22h 52m

$217

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/28

Compare providers for flights from Charleston to Ontario

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 Charleston to Ontario in May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 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 Charleston-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Charleston-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Charleston-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Charleston-Ontario 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 Charleston-Ontario 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 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 May 28, 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.

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 May 28, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from Charleston to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Crew

8.5

Comfort

7.9

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

Entertainment

7.1

Food

7.1

Overall

8.0

Crew

8.5

Comfort

7.9

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
4,286 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Crew

8.5

Comfort

7.9

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
7,957 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Crew

8.5

Comfort

7.9

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
8,756 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Crew

8.5

Comfort

7.9

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
2,927 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Crew

8.5

Comfort

7.9

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 American Airlines is currently your cheapest option to Ontario, with prices starting at $331. Additional round-trip tickets that might be worth considering are offered by Southwest and United Airlines, with the lowest prices starting at $422 and $444, respectively. American Airlines is currently priced 20% below the average price you’ll pay for this route.

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

    $166 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on American Airlines and Delta, with prices starting from $171 and $180, 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
Charleston to Las Vegas flights
Charlotte to Los Angeles flights
Charlotte to San Diego flights
Savannah to Las Vegas flights
Greenville to Las Vegas flights
Charlotte to Burbank flights
Columbia to Las Vegas flights
Charlotte to Ontario flights
Charleston to San Francisco flights
Charlotte to Santa Ana flights
Charlotte to Sacramento flights
Myrtle Beach to Las Vegas flights
Greenville to San Francisco flights
Greenville to Santa Ana flights
Charlotte to Oakland flights
Augusta to Las Vegas flights
Columbia to Los Angeles flights
Charleston to San Diego flights
Charlotte to San Jose flights
Columbia to San Diego flights
Savannah to Los Angeles flights
Charleston to Los Angeles flights
Charlotte to Reno flights
Myrtle Beach to Los Angeles flights
Charlotte to Fresno flights
Augusta to San Diego flights
Greenville to Los Angeles flights
Charleston to Santa Ana flights
Savannah to San Diego flights
Greenville to Ontario flights
Savannah to Reno flights
Greenville to San Jose flights
Savannah to San Francisco flights
Myrtle Beach to San Francisco flights
Columbia to San Francisco flights
Charlotte to Palm Springs flights
Myrtle Beach to Santa Ana flights
Myrtle Beach to Ontario flights
Augusta to San Francisco flights
Charlotte to Monterey flights
Savannah to Ontario flights
Columbia to Ontario flights
Charlotte to Santa Barbara flights
Charleston to Reno flights
Greenville to San Diego flights
Greenville to Sacramento flights
Charleston to Sacramento 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 May 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$267Average$421FlexibilityNo cancel feeOn-time71%
DeltaCheapest$296Average$376FlexibilityNo 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.