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$149+ 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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
CHS — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$296
(Alaska Airlines)

One-way from

$149
(Delta)

Popular in

April

Cheapest in

February

Average price

$322
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. 11% potential increase in price ($54 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($16 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 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 June 12, 2025.

This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/36:13 pmCHS - ONT
1 stop19h 31mAlaska Airlines
Mon 9/1511:39 amONT - CHS
1 stop26h 38mAlaska Airlines
Deal found 6/11$296
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.
Wed 9/36:30 amCHS - ONT
2 stops12h 35mAmerican Airlines
Mon 9/1510:35 pmONT - CHS
1 stop8h 07mAmerican Airlines
Deal found 6/11$302
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/231:00 pmCHS - ONT
1 stop9h 11mDelta
Wed 8/277:05 amONT - CHS
1 stop8h 49mDelta
Deal found 6/11$306
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/146:55 amCHS - ONT
1 stop11h 50mSouthwest
Mon 9/225:20 amONT - CHS
2 stops9h 35mSouthwest
Deal found 6/10$383
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/215:16 pmCHS - ONT
1 stop7h 09mUnited Airlines
Mon 8/255:10 amONT - CHS
1 stop7h 00mUnited Airlines
Deal found 6/11$397
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/89:05 amCHS - ONT
2 stops17h 45mFrontier
Sun 8/105:21 pmONT - CHS
2 stops11h 45mFrontier
Deal found 6/9$540

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 June 12, 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 9/3

6:13 pm-10:44 am

1 stop19h 31m

Ontario

Mon 9/15

11:39 am-5:17 pm

1 stop26h 38m

$296

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Wed 9/3

6:30 am-4:05 pm

2 stops12h 35m

Ontario

Mon 9/15

10:35 pm-9:42 am

1 stop8h 07m

$302

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Sat 8/23

1:00 pm-7:11 pm

1 stop9h 11m

Ontario

Wed 8/27

7:05 am-6:54 pm

1 stop8h 49m

$306

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Sun 9/14

6:55 am-3:45 pm

1 stop11h 50m

Ontario

Mon 9/22

5:20 am-5:55 pm

2 stops9h 35m

$383

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Thu 8/21

5:16 pm-9:25 pm

1 stop7h 09m

Ontario

Mon 8/25

5:10 am-3:10 pm

1 stop7h 00m

$397

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Fri 8/8

9:05 am-11:50 pm

2 stops17h 45m

Ontario

Sun 8/10

5:21 pm-8:06 am

2 stops11h 45m

$540

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Tue 8/19

4:44 pm-10:20 pm

1 stop8h 36m

$149

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Sat 9/13

8:12 am-6:11 pm

2 stops12h 59m

$163

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Wed 7/2

4:27 pm-8:54 pm

1 stop7h 27m

$186

CharlestonOntario

CHS - ONT

CHSONT

Charleston

Tue 9/9

6:17 pm-9:26 am

2 stops18h 09m

$211

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 June 12, 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 June 12, 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

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

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

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

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

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

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

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

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

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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

Overall

8.0

Entertainment

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 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 Alaska Airlines is currently your cheapest option to Ontario, with prices starting at $296. Additional round-trip tickets that might be worth considering are offered by American Airlines and Delta, with the lowest prices starting at $302 and $306, respectively. Alaska Airlines is currently priced 28% below the average price you’ll pay for this route.

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

    $149 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on United Airlines and Alaska Airlines, with prices starting from $186 and $211, 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

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$267Average$416FlexibilityNo cancel feeOn-time71%
DeltaCheapest$296Average$332FlexibilityNo cancel feeOn-timeN/A

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