ONT

$97 Find Cheap Flights from Maryland to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Ontario departing on 9/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Flight Deals

Cheap Flights from Maryland to Ontario

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Maryland to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Maryland to Ontario

Mon, Aug 10 - Sat, Aug 15
Frontier Logo
4:44 pm - 7:32 am
BWI
-
ONT
17h 48m
1 stop
Frontier Logo
9:36 am - 8:39 pm
ONT
-
BWI
8h 03m
1 stop
$240Frontier
Sat, Jul 4 - Sat, Jul 11
Frontier Logo
5:36 pm - 7:22 am
BWI
-
ONT
16h 46m
1 stop
Frontier Logo
9:32 am - 8:36 pm
ONT
-
BWI
8h 04m
1 stop
$241Frontier
Thu, Jul 2 - Sat, Jul 11
Frontier Logo
12:21 pm - 4:48 pm
BWI
-
ONT
7h 27m
1 stop
Frontier Logo
9:32 am - 8:36 pm
ONT
-
BWI
8h 04m
1 stop
$242Frontier
Sat, Jul 4 - Fri, Jul 10
Frontier Logo
5:36 pm - 7:22 am
BWI
-
ONT
16h 46m
1 stop
Frontier Logo
9:32 am - 8:36 pm
ONT
-
BWI
8h 04m
1 stop
$243Frontier
Fri, Jul 3 - Sat, Jul 11
Frontier Logo
5:32 pm - 5:52 pm
BWI
-
ONT
27h 20m
1 stop
Frontier Logo
9:32 am - 8:36 pm
ONT
-
BWI
8h 04m
1 stop
$244Frontier
Fri, Jul 24 - Sat, Jul 25
Frontier Logo
4:44 pm - 7:32 am
BWI
-
ONT
17h 48m
1 stop
Frontier Logo
9:32 am - 8:36 pm
ONT
-
BWI
8h 04m
1 stop
$247Frontier
Fri, Nov 6 - Mon, Nov 16
Delta Logo
5:12 pm - 10:14 pm
PHL
-
ONT
8h 02m
1 stop
Delta Logo
10:59 pm - 11:02 am
ONT
-
PHL
9h 03m
1 stop
$310Delta
Tue, Sep 8 - Fri, Sep 11
Multiple Airlines Logo
9:20 am - 3:09 pm
IAD
-
ONT
8h 49m
1 stop
Multiple Airlines Logo
3:14 pm - 5:40 am
ONT
-
IAD
11h 26m
1 stop
$311Multiple Airlines
Fri, Oct 23 - Thu, Oct 29
Delta Logo
6:40 pm - 11:48 pm
PHL
-
ONT
8h 08m
1 stop
Delta Logo
5:50 pm - 6:03 am
ONT
-
PHL
9h 13m
1 stop
$313Delta
Tue, Aug 18 - Sun, Aug 23
Delta Logo
6:00 am - 10:42 am
DCA
-
ONT
7h 42m
1 stop
Delta Logo
10:00 pm - 9:10 am
ONT
-
DCA
8h 10m
1 stop
$324Delta
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$97
Best time to beat the crowds with an average 5% drop in price.
Most popular time to fly and prices are also 2% lower on average.
Flight from Washington Dulles Airport to Ontario

FAQs for booking flights from Maryland to Ontario

  • How does KAYAK find such low prices on flights from Maryland to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Maryland to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Maryland to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Maryland is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Maryland to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Maryland with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Maryland to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Maryland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario

Ontario (ONT)