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.

$115 CHEAP FLIGHTS from Maryland to Ontario

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Flight Deals

Cheap Flights from Maryland to Ontario

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Maryland to Ontario

Wed, Oct 7 - Fri, Oct 16

12:40 pm - 11:47 pmPHL Philadelphia-ONT Ontario

14h 07m2 stops Atlanta Hartsfield-Jackson Denver Intl

8:35 pm - 7:18 amONT Ontario-PHL Philadelphia

7h 43m1 stop Las Vegas Harry Reid Intl

$248Frontier

Wed, Nov 4 - Mon, Nov 9

11:07 am - 4:38 pmBWI Baltimore/Washington-ONT Ontario

8h 31m1 stop Dallas/Fort Worth

8:03 pm - 11:08 amONT Ontario-BWI Baltimore/Washington

12h 05m1 stop Dallas/Fort Worth

$252Frontier

Thu, Oct 29 - Tue, Nov 3

12:31 pm - 7:08 pmIAD Washington, D.C. Dulles Intl-ONT Ontario

9h 37m1 stop Dallas/Fort Worth

4:09 pm - 5:44 amONT Ontario-IAD Washington, D.C. Dulles Intl

10h 35m1 stop Seattle/Tacoma Intl

$307Multiple Airlines

Sat, Sep 26 - Mon, Sep 28

6:00 pm - 11:47 pmDCA Washington, D.C. Reagan-National-ONT Ontario

8h 47m1 stop Denver Intl

6:14 pm - 4:00 pmONT Ontario-DCA Washington, D.C. Reagan-National

18h 46m1 stop Portland

$318Multiple Airlines

Thu, Nov 12 - Mon, Nov 16

6:00 am - 11:08 amDCA Washington, D.C. Reagan-National-ONT Ontario

8h 08m1 stop Atlanta Hartsfield-Jackson

12:18 pm - 10:45 pmONT Ontario-DCA Washington, D.C. Reagan-National

7h 27m1 stop Atlanta Hartsfield-Jackson

$351Delta

Sat, Oct 17 - Mon, Oct 19

6:00 am - 11:06 amDCA Washington, D.C. Reagan-National-ONT Ontario

8h 06m1 stop Atlanta Hartsfield-Jackson

11:08 pm - 9:10 amONT Ontario-DCA Washington, D.C. Reagan-National

7h 02m1 stop Atlanta Hartsfield-Jackson

$351Delta

Wed, Jan 6 - Wed, Jan 13

6:20 am - 1:10 pmDCA Washington, D.C. Reagan-National-ONT Ontario

9h 50m1 stop Dallas Love Field

12:45 pm - 11:00 pmONT Ontario-DCA Washington, D.C. Reagan-National

7h 15m1 stop Houston Hobby

$351Southwest

Mon, Nov 9 - Mon, Nov 16

5:00 am - 9:40 amDCA Washington, D.C. Reagan-National-ONT Ontario

7h 40m1 stop Dallas/Fort Worth

11:59 pm - 11:00 amONT Ontario-DCA Washington, D.C. Reagan-National

8h 01m1 stop Dallas/Fort Worth

$351American Airlines

Wed, Nov 18 - Wed, Nov 25

8:20 am - 1:31 pmDCA Washington, D.C. Reagan-National-ONT Ontario

8h 11m1 stop Dallas/Fort Worth

12:45 pm - 11:59 pmONT Ontario-DCA Washington, D.C. Reagan-National

8h 14m1 stop Dallas/Fort Worth

$351American Airlines

Wed, Jan 6 - Wed, Jan 13

6:20 am - 1:25 pmDCA Washington, D.C. Reagan-National-ONT Ontario

10h 05m2 stops Dallas Love Field Phoenix Sky Harbor Intl

11:20 am - 11:00 pmONT Ontario-DCA Washington, D.C. Reagan-National

8h 40m1 stop Dallas Love Field

$356Southwest

Recent last minute flight deals from Maryland to Ontario

Sat, Sep 12 - Sat, Oct 24

6:00 am - 4:46 pmPHL Philadelphia-ONT Ontario

13h 46m1 stop Dallas/Fort Worth

5:25 pm - 7:18 amONT Ontario-PHL Philadelphia

10h 53m1 stop Las Vegas Harry Reid Intl

$330Frontier

Sat, Sep 12 - Sat, Sep 26

6:00 pm - 11:47 pmDCA Washington, D.C. Reagan-National-ONT Ontario

8h 47m1 stop Denver Intl

6:15 am - 12:11 pmONT Ontario-DCA Washington, D.C. Reagan-National

26h 56m1 stop Denver Intl

$379Frontier

Tue, Sep 15 - Tue, Oct 6

6:00 am - 4:59 pmIAD Washington, D.C. Dulles Intl-ONT Ontario

13h 59m1 stop Las Vegas Harry Reid Intl

11:13 am - 11:59 pmONT Ontario-IAD Washington, D.C. Dulles Intl

9h 46m1 stop Seattle/Tacoma Intl

$393Multiple Airlines

Tue, Sep 15 - Sat, Sep 26

7:00 am - 2:16 pmIAD Washington, D.C. Dulles Intl-ONT Ontario

10h 16m1 stop Seattle/Tacoma Intl

3:14 pm - 5:40 amONT Ontario-IAD Washington, D.C. Dulles Intl

11h 26m1 stop Seattle/Tacoma Intl

$489Alaska Airlines

Tue, Sep 15 - Tue, Sep 22

3:57 pm - 8:07 pmBWI Baltimore/Washington-ONT Ontario

7h 10m1 stop Dallas/Fort Worth

10:25 am - 9:29 pmONT Ontario-BWI Baltimore/Washington

8h 04m1 stop Dallas/Fort Worth

$515American Airlines

Sat, Sep 12 - Tue, Sep 15

7:26 am - 1:25 pmBWI Baltimore/Washington-ONT Ontario

8h 59m1 stop Dallas/Fort Worth

10:25 am - 9:29 pmONT Ontario-BWI Baltimore/Washington

8h 04m1 stop Dallas/Fort Worth

$515American Airlines

Sat, Sep 12 - Tue, Sep 15

2:30 pm - 6:41 pmPHL Philadelphia-ONT Ontario

7h 11m1 stop Atlanta Hartsfield-Jackson

7:05 am - 6:08 pmONT Ontario-PHL Philadelphia

8h 03m1 stop Atlanta Hartsfield-Jackson

$569Delta

Wed, Sep 9 - Wed, Sep 16

3:54 pm - 8:24 pmPHL Philadelphia-ONT Ontario

7h 30m1 stop Atlanta Hartsfield-Jackson

12:17 pm - 12:40 amONT Ontario-PHL Philadelphia

9h 23m1 stop Atlanta Hartsfield-Jackson

$569Delta

Sat, Sep 12 - Tue, Sep 15

9:25 am - 4:30 pmDCA Washington, D.C. Reagan-National-ONT Ontario

10h 05m2 stops Dallas Love Field Denver Intl

12:30 pm - 10:20 pmONT Ontario-DCA Washington, D.C. Reagan-National

6h 50m1 stop Houston Hobby

$572Southwest

Sat, Sep 12 - Tue, Sep 15

10:00 am - 4:30 pmDCA Washington, D.C. Reagan-National-ONT Ontario

9h 30m2 stops Nashville Intl Denver Intl

7:45 am - 7:10 pmONT Ontario-DCA Washington, D.C. Reagan-National

8h 25m2 stops Las Vegas Harry Reid Intl Chicago Midway

$577Southwest

Useful Info

Low season	January
High season	November
Cheapest flight	$115

Best time to beat the crowds with an average 10% drop in price.

Most popular time to fly and prices are also 6% lower on average.

Flight from Philadelphia 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.