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$111+ 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
Nov 22 — Nov 291
Sat 11/22
Sat 11/29
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 May, booked 41 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 October 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$204
(Booking.com)

One-way from

$111
(Frontier)

Popular in

December

Cheapest in

October

Average price

$374
Provider with most accurate pricing for Grand Rapids Gerald R. Ford Intl-Ontario flight deals.
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Provider most trusted by Cheapflights users for Grand Rapids Gerald R. Ford Intl-Ontario flights.
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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. 6% potential increase in price ($36 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 23, 2025.

This Booking.com deal was found by Cheapflights users on 10/22. 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 10/308:49 pmGRR - ONT
1 stop17h 21mFrontier
Sun 11/25:53 amONT - GRR
1 stop10h 00mFrontier
Deal found 10/22$230
This Frontier deal was found by Cheapflights users on 10/21. 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.
Mon 10/278:49 pmGRR - ONT
1 stop6h 01mFrontier
Thu 10/306:53 amONT - GRR
1 stop10h 00mFrontier
Deal found 10/21$272
This Gotogate deal was found by Cheapflights users on 10/22. 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.
Thu 11/68:49 pmGRR - ONT
1 stop17h 21mFrontier
Sun 11/96:45 amONT - GRR
1 stop10h 08mFrontier
Deal found 10/22$278
This Frontier deal was found by Cheapflights users on 10/22. 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 11/136:53 amONT - GRR
1 stop10h 00mFrontier
Deal found 10/22$283
This Delta deal was found by Cheapflights users on 10/22. 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 12/105:55 pmGRR - ONT
1 stop8h 09mDelta
Tue 12/1612:12 pmONT - GRR
1 stop8h 15mDelta
Deal found 10/22$287
This Delta deal was found by Cheapflights users on 10/21. 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 12/106:05 amGRR - ONT
1 stop7h 57mDelta
Wed 12/1010:25 pmONT - GRR
2 stops13h 32mDelta
Deal found 10/21$292
This Delta deal was found by Cheapflights users on 10/22. 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.
Tue 12/96:05 amGRR - ONT
1 stop7h 57mDelta
Mon 12/1510:25 pmONT - GRR
1 stop10h 00mDelta
Deal found 10/22$307
This Delta deal was found by Cheapflights users on 10/22. 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.
Sat 12/67:00 amGRR - ONT
2 stops13h 08mDelta
Mon 12/810:25 pmONT - GRR
1 stop10h 00mDelta
Deal found 10/22$312
This Frontier deal was found by Cheapflights users on 10/21. 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.
Fri 11/214:44 pmGRR - ONT
1 stop10h 13mFrontier
Sun 11/2312:58 amONT - GRR
1 stop11h 51mFrontier
Deal found 10/21$322

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 October 23, 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

Tue 12/9

6:05 am-11:02 am

1 stop7h 57m

Ontario

Tue 12/16

10:25 pm-11:25 am

1 stop10h 00m

$287

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

Wed 12/10

1:25 pm-6:15 pm

1 stop7h 50m

Ontario

Mon 12/15

6:50 am-4:25 pm

1 stop6h 35m

$287

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

Sat 12/6

7:00 am-5:08 pm

2 stops13h 08m

Ontario

Mon 12/8

10:25 pm-11:25 am

1 stop10h 00m

$312

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

Thu 12/11

6:05 am-11:02 am

1 stop7h 57m

Ontario

Mon 12/15

10:25 pm-11:25 am

1 stop10h 00m

$327

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

Tue 12/9

3:25 pm-8:42 pm

1 stop8h 17m

Ontario

Wed 12/17

5:05 am-2:23 pm

1 stop6h 18m

$377

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

Tue 12/9

12:56 pm-8:42 pm

2 stops10h 46m

Ontario

Tue 12/16

1:34 pm-10:29 pm

1 stop5h 55m

$382

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

Thu 12/11

3:25 pm-8:42 pm

1 stop8h 17m

Ontario

Wed 12/17

5:05 am-2:23 pm

1 stop6h 18m

$397

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

Thu 11/20

1:52 pm-9:06 pm

1 stop10h 14m

Ontario

Mon 11/24

5:06 pm-10:09 pm

2 stops50h 03m

$400

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

Wed 12/10

7:30 am-5:37 pm

2 stops13h 07m

Ontario

Sat 12/13

5:05 am-2:23 pm

1 stop6h 18m

$402

Grand RapidsOntario

GRR - ONT

GRRONT

Grand Rapids Gerald R. Ford Intl

Fri 12/12

5:55 pm-11:04 pm

1 stop8h 09m

Ontario

Sat 12/13

7:05 am-4:46 pm

1 stop6h 41m

$407

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

Showing 1-10 of 21 results
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Compare providers for flights from Grand Rapids 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 Grand Rapids to Ontario in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*3 stars
PricelinePrice Accuracy1 starTrust 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 Grand Rapids-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Grand Rapids-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Grand Rapids-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Grand Rapids-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub 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 Grand Rapids-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 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 October 17, 2025.

The best time to book flights from Grand Rapids to Ontario is 41 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, May is the cheapest month in which you can book a flight from Grand Rapids to Ontario (average of $83). Flying from Grand Rapids to Ontario in March is currently the most expensive (average of $287). 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 October 23, 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 October 23, 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
4,237 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Comfort

8.0

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
4,237 reviews
Southwest
8.0
Very good
4,237 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Comfort

8.0

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
7.9
Good
7,981 reviews
Southwest
8.0
Very good
4,237 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Comfort

8.0

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
8,990 reviews
Southwest
8.0
Very good
4,237 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Comfort

8.0

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
11,028 reviews
Southwest
8.0
Very good
4,237 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Comfort

8.0

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
3,129 reviews
Southwest
8.0
Very good
4,237 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Comfort

8.0

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.

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

    Delta and Southwest can get you from Grand Rapids to Ontario in just under 7h 50m. Your travel time can differ by up to 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 $145. Additional round-trip tickets that might be worth considering are offered by Delta and Southwest, with the lowest prices starting at $312 and $324, respectively. These flights start at 70% 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 $148. Southwest flights start at $169 while deals on American Airlines start at $180 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, May is the cheapest month in which you can book a flight from Grand Rapids to Ontario (average of $83). Flying from Grand Rapids to Ontario in March is currently the most expensive (average of $287). 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 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 October 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$145Average$224FlexibilityNo cancel feeOn-time62%
DeltaCheapest$312Average$493FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$324Average$456FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$334Average$453FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$363Average$490FlexibilityNo cancel feeOn-time69%

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