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$106+ Cheap flights from Raleigh to Ontario (RDU - 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Raleigh-Durham to Ontario are usually found in March or November, booked 85 days in advance, depart on a Monday or Wednesday and return on a Wednesday

Cheap flight deals from Raleigh to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Raleigh (RDU) 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

$209
(Frontier)

One-way from

$106
(Trip.com)

Popular in

December

Cheapest in

March

Average price

$429
From Raleigh-Durham to Ontario
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One-way flight from Raleigh-Durham to Ontario
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Highest demand for flights based on searches. 7% potential increase in price ($32 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 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 Raleigh to Ontario

Cheapest flights from Raleigh to Ontario
Explore the most affordable flight options available from Raleigh to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/107:30 amRDU - ONT
1 stop11h 49mFrontier
Thu 7/175:14 pmONT - RDU
1 stop10h 21mFrontier
Deal found 6/10$209
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.
Wed 9/247:25 amRDU - ONT
1 stop6h 59mDelta
Tue 9/3010:59 pmONT - RDU
1 stop6h 52mDelta
Deal found 6/11$297
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/207:13 amRDU - ONT
1 stop9h 26mAmerican Airlines
Sun 8/242:31 pmONT - RDU
1 stop7h 11mAmerican Airlines
Deal found 6/10$332
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.
Tue 7/86:02 amRDU - ONT
1 stop9h 12mUnited Airlines
Sat 7/195:05 amONT - RDU
2 stops9h 11mUnited Airlines
Deal found 6/10$384
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 9/177:36 amRDU - ONT
1 stop9h 33mAlaska Airlines
Tue 9/236:00 amONT - RDU
2 stops14h 10mAlaska Airlines
Deal found 6/11$402
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.
Tue 7/156:05 amRDU - ONT
2 stops9h 20mSouthwest
Sat 7/266:00 amONT - RDU
1 stop7h 00mSouthwest
Deal found 6/10$403

Cheapflights Fare Finder

Customize your flight search to find flights from Raleigh 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 Raleigh to Ontario that are best for you.

Fly from

Raleigh

Fly to

Ontario

Route

Depart

Return

Price

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Thu 7/10

7:30 am-4:19 pm

1 stop11h 49m

Ontario

Thu 7/17

5:14 pm-6:35 am

1 stop10h 21m

$209

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Thu 8/7

6:39 pm-11:42 pm

1 stop8h 03m

Ontario

Sat 8/9

7:05 am-7:10 pm

1 stop9h 05m

$297

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Wed 8/20

7:13 am-1:39 pm

1 stop9h 26m

Ontario

Sun 8/24

2:31 pm-12:42 am

1 stop7h 11m

$332

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Tue 7/8

6:02 am-12:14 pm

1 stop9h 12m

Ontario

Sat 7/19

7:00 am-5:16 pm

1 stop7h 16m

$379

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Tue 7/15

6:05 am-12:25 pm

2 stops9h 20m

Ontario

Sat 7/26

6:00 am-4:00 pm

1 stop7h 00m

$403

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Tue 7/29

7:36 am-2:46 pm

1 stop10h 10m

Ontario

Tue 8/5

6:58 pm-11:31 am

2 stops13h 33m

$443

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Fri 8/15

7:30 am-8:52 pm

1 stop16h 22m

$106

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Mon 7/14

8:29 pm-9:09 am

1 stop15h 40m

$141

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Wed 7/2

2:50 pm-9:33 pm

1 stop9h 43m

$145

RaleighOntario

RDU - ONT

RDUONT

Raleigh-Durham

Tue 8/12

7:36 am-2:46 pm

1 stop10h 10m

$148

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 14 results
1
2

Best time to book a flight from Raleigh to Ontario

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

How far ahead should I book a flight from Raleigh to Ontario?

Use this chart to determine the optimal time to book a round-trip flight from Raleigh to Ontario. Price data was last updated on June 9, 2025.

Booking 85 days in advance of your planned departure date is, on average, the best time to get cheap flights from Raleigh to Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, August is the cheapest month in which you can book a flight from Raleigh to Ontario (average of $246). Flying from Raleigh 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 RDU to ONT?

Find hourly flight availability from Raleigh 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.

Unlike in the morning, when flights are generally more expensive, you can save up to 29% on flights from Raleigh to Ontario by exploring options for tickets in the evening.

What is the cheapest day to fly from Raleigh to Ontario?

Use this chart to determine the cheapest time to fly round-trip from Raleigh to Ontario. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Raleigh to Ontario flight should consider departing on Tuesday evenings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Raleigh to Ontario to help guide your decision. 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

Food

7.1

Entertainment

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

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

Food

7.1

Entertainment

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

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

Food

7.1

Entertainment

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

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

Food

7.1

Entertainment

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

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

Food

7.1

Entertainment

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

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 Raleigh 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 Raleigh to Ontario round-trip?

    Flying on Frontier is currently your cheapest option to Ontario, with prices starting at $209. Additional round-trip tickets that might be worth considering are offered by Delta and American Airlines, with the lowest prices starting at $297 and $332, respectively. These flights start at 49% lower than the current average price 3 months from now.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $106. However, be on the lookout for offers from American Airlines and Alaska Airlines, as they are both options that can get you from Raleigh to Ontario for a low price.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Raleigh to Ontario (average of $246). Flying from Raleigh 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 Raleigh to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Raleigh to Ontario

Discover the top 5 airlines that operate flights from Raleigh 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
FrontierCheapest$148Average$269FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$275Average$490FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$299Average$433FlexibilityNo cancel feeOn-time71%
DeltaCheapest$311Average$438FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$327Average$452FlexibilityNo cancel feeOn-time63%

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