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$79+ 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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
GRR — ONT
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
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 August 18, 2025.

Round-trip from

$145
(Mytrip)

One-way from

$79
(Booking.com)

Popular in

December

Cheapest in

October

Average price

$632
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 ($51 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 August 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 August 18, 2025.

This Mytrip deal was found by Cheapflights users on 8/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/128:33 pmGRR - ONT
1 stop26h 21mFrontier
Sun 9/148:59 pmONT - GRR
1 stop19h 39mFrontier
Deal found 8/15$145
This Booking.com deal was found by Cheapflights users on 8/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/268:33 pmGRR - ONT
1 stop26h 21mFrontier
Sun 9/288:59 pmONT - GRR
1 stop19h 39mFrontier
Deal found 8/17$146
This Booking.com deal was found by Cheapflights users on 8/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/44:20 pmGRR - ONT
1 stop6h 34mFrontier
Sun 9/78:59 pmONT - GRR
1 stop19h 39mFrontier
Deal found 8/16$182
This Mytrip deal was found by Cheapflights users on 8/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/148:33 pmGRR - ONT
1 stop26h 21mFrontier
Sun 9/218:59 pmONT - GRR
1 stop19h 39mFrontier
Deal found 8/17$186
This Frontier deal was found by Cheapflights users on 8/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/98:49 pmGRR - ONT
1 stop6h 01mFrontier
Thu 11/136:00 amONT - GRR
2 stops10h 53mFrontier
Deal found 8/17$189
This Booking.com deal was found by Cheapflights users on 8/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/258:39 pmGRR - ONT
1 stop6h 11mFrontier
Wed 8/2712:59 amONT - GRR
1 stop15h 45mFrontier
Deal found 8/16$210
This FlightHub deal was found by Cheapflights users on 8/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/24:20 pmGRR - ONT
1 stop6h 34mFrontier
Sun 10/58:59 pmONT - GRR
1 stop19h 39mFrontier
Deal found 8/16$212
This FlightHub deal was found by Cheapflights users on 8/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/204:56 pmGRR - ONT
1 stop9h 54mFrontier
Thu 9/48:59 pmONT - GRR
1 stop19h 39mFrontier
Deal found 8/16$221
This Frontier deal was found by Cheapflights users on 8/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/65:58 pmGRR - ONT
2 stops16h 19mFrontier
Sun 9/710:13 pmONT - GRR
2 stops18h 25mFrontier
Deal found 8/15$225
This Gotogate deal was found by Cheapflights users on 8/17. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/248:34 pmGRR - ONT
1 stop15h 11mFrontier
Wed 8/2712:59 amONT - GRR
1 stop15h 45mFrontier
Deal found 8/17$234

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 August 18, 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

Fri 9/12

8:33 pm-7:54 pm

1 stop26h 21m

Ontario

Sun 9/14

8:59 pm-7:38 pm

1 stop19h 39m

$145

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

Fri 9/26

8:33 pm-7:54 pm

1 stop26h 21m

Ontario

Sun 9/28

8:59 pm-7:38 pm

1 stop19h 39m

$146

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

Sun 11/9

8:49 pm-11:50 pm

1 stop6h 01m

Ontario

Thu 11/13

6:53 am-7:53 pm

1 stop10h 00m

$146

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

Thu 9/4

4:20 pm-7:54 pm

1 stop6h 34m

Ontario

Sun 9/7

8:59 pm-7:38 pm

1 stop19h 39m

$182

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

Sun 9/14

8:33 pm-7:54 pm

1 stop26h 21m

Ontario

Sun 9/21

8:59 pm-7:38 pm

1 stop19h 39m

$186

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

Mon 8/25

8:39 pm-11:50 pm

1 stop6h 11m

Ontario

Wed 8/27

12:59 am-7:44 pm

1 stop15h 45m

$210

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

Thu 10/2

4:20 pm-7:54 pm

1 stop6h 34m

Ontario

Sun 10/5

8:59 pm-7:38 pm

1 stop19h 39m

$212

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

Wed 8/20

4:56 pm-11:50 pm

1 stop9h 54m

Ontario

Thu 9/4

8:59 pm-7:38 pm

1 stop19h 39m

$221

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

Sat 9/6

5:58 pm-7:17 am

2 stops16h 19m

Ontario

Sun 9/7

10:13 pm-7:38 pm

2 stops18h 25m

$225

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

Sun 9/7

8:33 pm-7:23 am

1 stop13h 50m

$79

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 18 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 August 8, 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 $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 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 August 18, 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.

What’s the top layover airport for flights from Grand Rapids to Ontario?

Share of 1-stop round-trip flights from Grand Rapids to Ontario chosen by Cheapflights users in the past 12 months, using the same layover each way.

Chicago (MDW) – chosen by Cheapflights users on 50% of 1-stop itineraries from Grand Rapids to Ontario on Cheapflights.

What’s the cheapest layover airport for flights from Grand Rapids to Ontario?

Average round-trip fare for 1-stop flights from Grand Rapids to Ontario, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $253.

What’s the fastest layover option from Grand Rapids to Ontario?

Shortest average travel time for 1-stop one-way flights from Grand Rapids to Ontario, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Chicago (MDW) have the shortest average one-way travel time for 1-stop routes: 10h 05m.

Which airport typically offers the quickest layover for flights from Grand Rapids to Ontario?

Average layover duration for 1-stop one-way flights from Grand Rapids to Ontario, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Chicago (MDW) offer the fastest connection on this route, with an average layover time of 3h 50m.

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 August 18, 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
4,246 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

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
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

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
7,981 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

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
8,925 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

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
4,246 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

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
3,212 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

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.

  • 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 $148. Additional round-trip tickets that might be worth considering are offered by Southwest and American Airlines, with the lowest prices starting at $324 and $334, respectively. These flights start at 69% lower than the current average price 3 months from now.

  • 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 $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 Grand Rapids to Ontario

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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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$148Average$188FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$324Average$481FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$334Average$456FlexibilityNo cancel feeOn-time71%
DeltaCheapest$336Average$477FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$369Average$490FlexibilityNo cancel feeOn-time69%

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