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$70+ 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 2/17. Fares are subject to change and may not be available on all flights or dates of travel.
BNA — ONT
Feb 17 — Feb 241
Tue 2/17
Tue 2/24
1 adult, Economy
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Find cheap flights from Nashville 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

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3. Compare prices and book

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Cheapflights Tip: The best prices from Nashville Intl to Ontario are usually found in August or November, booked 42 days in advance, depart on a Tuesday or Monday and return on a Tuesday

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 January 18, 2026.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$142
(Kiwi.com)

One-way from

$70
(Trip.com)

Popular in

October

Cheapest in

August

Average price

$422

Good round-trip deal

$457 or less

Good one-way deal

$138 or less
Provider with most accurate pricing for Nashville Intl-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Nashville Intl-Ontario flights.
Search Deals
From Nashville Intl to Ontario
Search Deals
One-way flight from Nashville Intl to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($29 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from Nashville Intl to Ontario.
Search Deals
Price to beat on a one-way flight from Nashville Intl to Ontario.
Search Deals

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 January 18, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/16. 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.
Tue 2/178:45 pm
BNA
-
ONT
1 stop18h 26m
Multiple Airlines
Tue 2/243:22 pm
ONT
-
BNA
1 stop11h 46m
Multiple Airlines
Deal found 1/16$142
This Trip.com deal was found by Cheapflights users on 1/17. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/168:45 pm
BNA
-
ONT
1 stop18h 26m
Multiple Airlines
Mon 2/236:43 pm
ONT
-
BNA
1 stop8h 25m
Multiple Airlines
Deal found 1/17$171
This Kiwi.com deal was found by Cheapflights users on 1/16. 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.
Wed 2/188:45 pm
BNA
-
ONT
1 stop18h 26m
Multiple Airlines
Thu 2/267:22 pm
ONT
-
BNA
1 stop7h 46m
Multiple Airlines
Deal found 1/16$178
This Frontier deal was found by Cheapflights users on 1/16. 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 2/57:37 pm
BNA
-
ONT
1 stop6h 43m
Frontier
Mon 2/96:20 am
ONT
-
BNA
1 stop10h 22m
Frontier
Deal found 1/16$180
This Trip.com deal was found by Cheapflights users on 1/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/57:37 pm
BNA
-
ONT
1 stop6h 43m
Multiple Airlines
Sat 2/148:09 pm
ONT
-
BNA
1 stop6h 59m
Multiple Airlines
Deal found 1/16$183
This Trip.com deal was found by Cheapflights users on 1/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/57:37 pm
BNA
-
ONT
1 stop6h 43m
Multiple Airlines
Tue 2/103:22 pm
ONT
-
BNA
1 stop12h 01m
Multiple Airlines
Deal found 1/16$184
This Trip.com deal was found by Cheapflights users on 1/16. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/118:43 pm
BNA
-
ONT
1 stop18h 28m
Multiple Airlines
Mon 2/163:28 pm
ONT
-
BNA
1 stop11h 40m
Multiple Airlines
Deal found 1/16$193
This Kiwi.com deal was found by Cheapflights users on 1/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/158:45 pm
BNA
-
ONT
1 stop18h 26m
Multiple Airlines
Thu 2/197:22 pm
ONT
-
BNA
1 stop7h 46m
Multiple Airlines
Deal found 1/15$197
This CheapOair deal was found by Cheapflights users on 1/16. 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 1/267:37 pm
BNA
-
ONT
1 stop21h 30m
Frontier
Mon 2/26:20 am
ONT
-
BNA
1 stop10h 22m
Frontier
Deal found 1/16$202
This Kiwi.com deal was found by Cheapflights users on 1/17. 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.
Tue 2/178:45 pm
BNA
-
ONT
1 stop18h 26m
Multiple Airlines
Fri 2/208:07 am
ONT
-
BNA
1 stop19h 01m
Multiple Airlines
Deal found 1/17$205
This Frontier deal was found by Cheapflights users on 1/16. 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.
Tue 3/173:01 pm
BNA
-
ONT
1 stop10h 58m
Frontier
Tue 3/246:15 am
ONT
-
BNA
1 stop6h 01m
Frontier
Deal found 1/16$210

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 January 18, 2026.
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

Mon 2/23

7:35 pm-11:59 pm

1 stop6h 24m

Ontario

Thu 2/26

6:05 am-6:50 pm

1 stop10h 45m

$262

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Sun 2/15

7:32 pm-11:59 pm

1 stop6h 27m

Ontario

Mon 2/23

6:43 pm-5:08 am

1 stop8h 25m

$264

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Fri 2/20

4:55 pm-11:49 pm

1 stop8h 54m

Ontario

Fri 2/27

10:20 pm-8:17 am

1 stop7h 57m

$283

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Mon 3/16

7:22 pm-11:50 pm

1 stop6h 28m

Ontario

Mon 3/23

10:25 pm-7:40 am

1 stop7h 15m

$283

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Thu 3/19

7:22 pm-11:50 pm

1 stop6h 28m

Ontario

Mon 3/23

10:25 pm-7:40 am

1 stop7h 15m

$283

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Wed 2/18

1:51 pm-9:05 pm

1 stop9h 14m

Ontario

Mon 2/23

1:10 pm-10:00 pm

1 stop6h 50m

$283

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Fri 3/20

7:22 pm-11:50 pm

1 stop6h 28m

Ontario

Mon 3/23

10:25 pm-7:40 am

1 stop7h 15m

$283

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Tue 3/17

7:25 am-12:23 pm

1 stop6h 58m

Ontario

Mon 3/23

10:25 pm-7:40 am

1 stop7h 15m

$283

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Sat 1/31

7:36 am-6:45 pm

1 stop13h 09m

Ontario

Mon 2/9

11:59 pm-8:55 am

1 stop6h 56m

$285

NashvilleOntario

BNA - ONT

BNAONT

Nashville Intl

Fri 4/3

7:22 pm-11:51 pm

1 stop6h 29m

Ontario

Sat 4/11

1:20 pm-9:38 pm

1 stop6h 18m

$285

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/15

Showing 1-10 of 24 results
1
2
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Compare providers for flights from Nashville 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 Nashville to Ontario in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapOairPrice Accuracy3 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 Nashville-Ontario flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Nashville-Ontario flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from Nashville-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Nashville-Ontario flights, Cheapflights users trust CheapOair the most. CheapOair 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 Nashville-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 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 January 16, 2026.

Booking 42 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 $73). Flying from Nashville to Ontario in February is currently the most expensive (average of $197). 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 January 18, 2026.

When flying from Nashville to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

The best insider tips for Nashville to Ontario flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
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

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 January 18, 2026.
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
4,261 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Overall

8.0

Crew

8.6

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
4,261 reviews
Southwest
8.0
Very good
4,261 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Overall

8.0

Crew

8.6

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
7.9
Good
8,075 reviews
Southwest
8.0
Very good
4,261 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Overall

8.0

Crew

8.6

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
9,174 reviews
Southwest
8.0
Very good
4,261 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Overall

8.0

Crew

8.6

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
11,155 reviews
Southwest
8.0
Very good
4,261 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Overall

8.0

Crew

8.6

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
5.7
Fair
3,057 reviews
Southwest
8.0
Very good
4,261 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Overall

8.0

Crew

8.6

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 6h 24m. There are 1745 mi between Nashville and Ontario. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Currently priced at $128, 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 $192 and $258, respectively. Frontier is currently priced 67% 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 Frontier. According to our data, you can fly for as low as $55. Users have also found prices from $112 and $128 on United Airlines and Delta, respectively.

  • What are the cheapest flights from Nashville to Ontario?

    While on average a flight from Nashville to Ontario is generally $361, our data shows the cheapest flight currently is $114. When looking at the most popular route, (Nashville Intl - Ontario), you can expect to pay $142 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 $73). Flying from Nashville to Ontario in February is currently the most expensive (average of $197). 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 January 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$128Average$245FlexibilityNo cancel feeOn-time62%
DeltaCheapest$192Average$297FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$258Average$379FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$284Average$393FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$358Average$514FlexibilityNo cancel feeOn-time63%

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