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$131+ Cheap flights from Grand Rapids to Ontario (GRR - 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 10/30. Fares are subject to change and may not be available on all flights or dates of travel.
GRR — ONT
oct. 16 — oct. 231
jue. 10/16
jue. 10/23
1 adult, Economy
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Cheapflights Tip: The best prices from Grand Rapids Gerald R. Ford Intl to Ontario are usually found in October or September, booked 27 days in advance, depart on a Saturday or Friday and return on a Wednesday

Cheap flight deals from Grand Rapids to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Grand Rapids (GRR) 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 septiembre 16, 2025.

Round-trip from

$155
(Frontier)

One-way from

$131
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$364
From Grand Rapids Gerald R. Ford Intl to Ontario
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One-way flight from Grand Rapids Gerald R. Ford Intl to Ontario
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Highest demand for flights based on searches. 9% potential increase in price ($48 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% 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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Find flight deals from Grand Rapids to Ontario

Cheapest flights from Grand Rapids to Ontario
Explore the most affordable flight options available from Grand Rapids to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 16, 2025.

This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/238:49 pmGRR - ONT
1 stop6h 01mFrontier
dom. 10/266:53 amONT - GRR
1 stop9h 56mFrontier
Deal found 9/14$155
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/238:49 pmGRR - ONT
1 stop6h 01mFrontier
lun. 10/276:53 amONT - GRR
1 stop9h 56mFrontier
Deal found 9/15$182
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/248:49 pmGRR - ONT
1 stop6h 01mFrontier
dom. 10/266:53 amONT - GRR
1 stop9h 56mFrontier
Deal found 9/14$191
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/177:33 pmGRR - ONT
1 stop7h 17mFrontier
vie. 10/246:53 amONT - GRR
1 stop9h 56mFrontier
Deal found 9/14$205
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/98:49 pmGRR - ONT
1 stop6h 01mFrontier
jue. 11/136:53 amONT - GRR
1 stop10h 00mFrontier
Deal found 9/13$232
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/208:49 pmGRR - ONT
1 stop6h 01mFrontier
dom. 10/266:53 amONT - GRR
1 stop9h 56mFrontier
Deal found 9/14$236
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/268:33 pmGRR - ONT
1 stop26h 21mFrontier
dom. 9/288:59 pmONT - GRR
1 stop19h 39mFrontier
Deal found 9/13$242
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/198:33 pmGRR - ONT
1 stop26h 21mFrontier
dom. 9/213:43 pmONT - GRR
1 stop24h 55mFrontier
Deal found 9/14$255
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/147:00 amGRR - ONT
1 stop8h 51mMultiple Airlines
dom. 11/166:53 amONT - GRR
1 stop10h 00mMultiple Airlines
Deal found 9/14$257
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.
dom. 12/71:59 pmGRR - ONT
1 stop10h 05mMultiple Airlines
vie. 12/1211:52 amONT - GRR
2 stops28h 05mMultiple Airlines
Deal found 9/13$258

Cheapflights Fare Finder

 
Customize your flight search to find flights from Grand Rapids 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 septiembre 16, 2025.
Use the filters below to find and compare flights from Grand Rapids to Ontario that are best for you.

Fly from

Grand Rapids

Fly to

Ontario

Route

Depart

Return

Price

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

vie. 10/10

8:49 pm-11:50 pm

1 stop6h 01m

Ontario

lun. 10/13

6:53 am-7:49 pm

1 stop9h 56m

$305

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

mié. 10/22

3:10 pm-7:03 pm

1 stop6h 53m

Ontario

sáb. 10/25

10:29 pm-10:47 am

1 stop9h 18m

$348

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

lun. 12/15

5:55 pm-11:03 pm

1 stop8h 08m

Ontario

mar. 12/16

10:25 pm-11:26 am

1 stop10h 01m

$348

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

jue. 11/6

8:49 pm-6:28 pm

2 stops24h 39m

Ontario

lun. 11/10

6:00 am-5:50 pm

1 stop8h 50m

$353

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

mié. 10/22

6:39 pm-10:30 pm

1 stop6h 51m

Ontario

sáb. 10/25

9:36 am-11:44 pm

2 stops11h 08m

$353

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

mié. 11/19

6:00 am-10:40 am

1 stop7h 40m

Ontario

lun. 11/24

6:45 am-11:59 pm

2 stops14h 14m

$353

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

mar. 11/18

12:57 pm-7:41 pm

1 stop9h 44m

Ontario

mié. 11/26

11:59 pm-11:11 am

1 stop8h 12m

$357

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

vie. 12/5

5:55 pm-11:03 pm

1 stop8h 08m

Ontario

mié. 12/10

10:25 pm-11:26 am

1 stop10h 01m

$358

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

jue. 11/13

5:55 pm-11:04 pm

1 stop8h 09m

Ontario

lun. 11/17

10:25 pm-11:19 am

1 stop9h 54m

$359

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

vie. 12/12

5:55 pm-11:03 pm

1 stop8h 08m

Ontario

lun. 12/15

10:25 pm-11:26 am

1 stop10h 01m

$369

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 16 results
1
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Best time to book a flight from Grand Rapids to Ontario

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

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

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

The best time to book flights from Grand Rapids to Ontario is 26 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, August is the cheapest month in which you can book a flight from Grand Rapids to Ontario (average of $246). Flying from Grand Rapids to Ontario in March is currently the most expensive (average of $327). 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 GRR to ONT?

Find hourly flight availability from Grand Rapids 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 septiembre 16, 2025.

When flying from Grand Rapids 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 50% versus a flight at noon.

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 septiembre 16, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Grand Rapids to Ontario. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

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
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

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
8.0
Very good
7,957 reviews
Southwest
8.0
Very good
4,242 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

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
8,924 reviews
Southwest
8.0
Very good
4,242 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

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
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

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
5.8
Fair
3,174 reviews
Southwest
8.0
Very good
4,242 reviews

Food

7.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

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 Grand Rapids to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Grand Rapids to Ontario?

    Frontier, American Airlines, and Delta can get you from Grand Rapids to Ontario in just under 6h 01m. Your travel time can differ by up to 2h 07m. The distance between Grand Rapids and Ontario is about 1824 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Flying on Frontier is currently your cheapest option to Ontario, with prices starting at $168. Additional round-trip tickets that might be worth considering are offered by Southwest and American Airlines, with the lowest prices starting at $324 and $336, respectively. These flights start at 65% lower than the current average price 3 months from now.

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

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $131. American Airlines flights start at $167 while deals on Delta start at $169 one-way.

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

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

  • How can I find direct flights from Grand Rapids to Ontario?

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

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

    Yes. Cheapflights offers flight deals from Grand Rapids 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 Grand Rapids to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Grand Rapids to Ontario (average of $246). Flying from Grand Rapids to Ontario in March is currently the most expensive (average of $327). 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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See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Grand Rapids to Ontario

Discover the top 5 airlines that operate flights from Grand Rapids 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 septiembre 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$168Average$189FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$324Average$463FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$336Average$456FlexibilityNo cancel feeOn-time71%
DeltaCheapest$336Average$477FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$369Average$490FlexibilityNo cancel feeOn-time69%

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