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$79+ Cheap flights from Nashville to Ontario (BNA - 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
BNA — ONT
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheapflights Tip: The best prices from Nashville Intl to Ontario are usually found in August or April, booked 74 days in advance, depart on a Sunday or Monday and return on a Saturday

Cheap flight deals from Nashville to Ontario

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

$145
(CheapOair)

One-way from

$79
(Trip.com)

Popular in

December

Cheapest in

August

Average price

$394

Good round-trip deal

$511 or less
From Nashville Intl to Ontario
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One-way flight from Nashville Intl to Ontario
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Highest demand for flights based on searches. 8% potential increase in price ($38 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Nashville Intl to Ontario.
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Find flight deals from Nashville to Ontario

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

This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/26:15 amBNA - ONT
1 stop27h 38mFrontier
Sun 10/58:59 pmONT - BNA
1 stop25h 41mFrontier
Deal found 9/14$145
This Gotogate deal was found by Cheapflights users on 9/13. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/269:38 pmBNA - ONT
1 stop24h 16mFrontier
Sat 10/48:59 pmONT - BNA
1 stop25h 41mFrontier
Deal found 9/13$160
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/13:42 pmBNA - ONT
1 stop10h 08mFrontier
Thu 11/612:05 pmONT - BNA
1 stop24h 42mFrontier
Deal found 9/15$165
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/299:38 pmBNA - ONT
1 stop24h 16mFrontier
Fri 10/38:59 pmONT - BNA
1 stop23h 34mFrontier
Deal found 9/13$166
This CheapOair deal was found by Cheapflights users on 9/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/247:30 amBNA - ONT
1 stop25h 53mFrontier
Wed 10/18:59 pmONT - BNA
1 stop25h 41mFrontier
Deal found 9/12$169
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/96:12 amBNA - ONT
1 stop19h 38mFrontier
Tue 10/147:04 amONT - BNA
1 stop14h 55mFrontier
Deal found 9/14$176
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.
Sat 11/158:24 amBNA - ONT
1 stop6h 09mUnited Airlines
Sat 11/156:38 pmONT - BNA
1 stop8h 35mUnited Airlines
Deal found 9/15$178
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/207:00 amBNA - ONT
1 stop26h 23mFrontier
Wed 10/18:59 pmONT - BNA
1 stop25h 41mFrontier
Deal found 9/14$180
This CheapOair deal was found by Cheapflights users on 9/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/136:12 amBNA - ONT
1 stop19h 38mFrontier
Mon 10/206:53 amONT - BNA
1 stop15h 06mFrontier
Deal found 9/13$181
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/299:38 pmBNA - ONT
1 stop24h 16mFrontier
Wed 10/18:59 pmONT - BNA
1 stop25h 41mFrontier
Deal found 9/13$182
This CheapOair deal was found by Cheapflights users on 9/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/117:00 amBNA - ONT
1 stop18h 50mFrontier
Sat 10/187:04 amONT - BNA
1 stop6h 39mFrontier
Deal found 9/13$183

Cheapflights Fare Finder

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

Fly from

Nashville

Fly to

Ontario

Route

Depart

Return

Price

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Sat 10/25

4:38 pm-11:50 pm

1 stop9h 12m

Ontario

Sat 11/8

6:53 am-2:47 pm

1 stop5h 54m

$145

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Fri 10/17

6:12 am-11:50 pm

1 stop19h 38m

Ontario

Mon 10/20

6:53 am-11:59 pm

1 stop15h 06m

$145

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Sat 9/27

7:00 am-7:23 am

1 stop26h 23m

Ontario

Mon 9/29

8:59 pm-9:44 pm

1 stop22h 45m

$160

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Tue 9/30

7:30 am-7:54 pm

1 stop14h 24m

Ontario

Sat 10/4

8:59 pm-12:40 am

1 stop25h 41m

$166

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Thu 10/9

6:12 am-11:50 pm

1 stop19h 38m

Ontario

Tue 10/14

7:04 am-11:59 pm

1 stop14h 55m

$176

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Mon 9/29

9:38 pm-7:54 pm

1 stop24h 16m

Ontario

Thu 10/2

8:59 pm-8:43 pm

1 stop21h 44m

$182

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Tue 9/30

7:30 am-7:54 pm

1 stop14h 24m

Ontario

Thu 10/2

8:59 pm-8:43 pm

1 stop21h 44m

$182

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Fri 10/17

6:12 am-11:50 pm

1 stop19h 38m

Ontario

Sun 10/19

6:53 am-11:59 pm

1 stop15h 06m

$203

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Sat 10/11

7:00 am-11:50 pm

1 stop18h 50m

Ontario

Wed 10/15

6:53 am-2:29 pm

2 stops29h 36m

$215

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Fri 9/26

9:38 pm-7:54 pm

1 stop24h 16m

Ontario

Mon 10/6

4:08 pm-12:40 am

1 stop6h 32m

$227

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 23 results
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The best insider tips for Nashville to Ontario flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Nashville to Ontario trip
Airports
BNA

For self-parking, Terminal Garage 1 and 2 are closest to the terminal, offering a flat daily rate.

Read more about BNAby Mark Chesnut
ONT

Consider renting a car at ONT for easy access to Southern California destinations like Palm Springs and Big Bear.

Read more about ONTby Bill Fink
Our travel experts
Bill Fink

Bill Fink

Expert on ONT

Bill Fink

Bill Fink

Bill is an award-winning travel writer with extensive credits covering airlines and the aviation industry for publications including AARP, AFAR, The Points Guy and Yahoo. Based in Portland, Oregon, Bill has traveled to more than 75 countries - and been late for his flight in most of them. He once achieved top-level frequent flier status for all of American, Delta and United Airlines during a single year.

Read more
Mark Chesnut

Mark Chesnut

Expert on BNA

Mark Chesnut

Mark Chesnut

Mark Chesnut is a travel writer and public speaker with more than 30 years of experience. The 2019 winner of the NLGJA Excellence in Travel Writing Award, Mark is the author of the book “Prepare for Departure” and has covered air travel for multiple top consumer and trade media outlets.

Read more

Best time to book a flight from Nashville to Ontario

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

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

Use this chart to determine the optimal time to book a round-trip flight from Nashville to Ontario. Price data was last updated on September 12, 2025.

Booking 74 days in advance of your planned departure date is, on average, the best time to get cheap flights from Nashville 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 Nashville to Ontario?

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

Find hourly flight availability from Nashville 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.

When flying from Nashville to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 35% versus a flight in the afternoon.

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

Use this chart to determine the cheapest time to fly round-trip from Nashville to Ontario. Price data was last updated on September 14, 2025.

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

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.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Nashville 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.
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,954 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,929 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,172 reviews
Southwest
8.0
Very good
4,242 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Food

7.0

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Nashville to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Nashville to Ontario flight route?

    Flights from Nashville Intl to Ontario have been viewed 1 times in the past calendar month.

  • How long is the flight from Nashville to Ontario?

    Departing from Nashville to Ontario will take you 9h 12m. There are 1745 mi between Nashville and Ontario.

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

    Currently priced at $118, Frontier will fly you from Nashville to Ontario and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and American Airlines - these airlines can fly you to your destination from $240 and $266, respectively. Frontier is currently priced 70% below the average price you’ll pay for this route.

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

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $97. Users have also found prices from $128 and $128 on Hawaiian Airlines and Alaska Airlines, respectively.

  • What are the cheapest flights from Nashville to Ontario?

    While on average a flight from Nashville to Ontario is generally $275, our data shows the cheapest flight currently is $215. When looking at the most popular route, (Nashville Intl - Ontario), you can expect to pay $145 for that flight.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Nashville to Ontario (average of $246). Flying from Nashville 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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Top 5 airlines flying from Nashville to Ontario

Discover the top 5 airlines that operate flights from Nashville 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
FrontierCheapest$118Average$276FlexibilityNo cancel feeOn-time62%
DeltaCheapest$236Average$338FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$266Average$392FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$288Average$393FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$313Average$505FlexibilityNo cancel feeOn-time63%

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