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Niagara Falls

$102+ Cheap flights from Dulles Intl (IAD) to Niagara Falls, ON, Canada

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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YYZ
Apr 4 — Apr 111
Sat 4/4
Sat 4/11
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Niagara Falls are usually found in September or April, booked 75 days in advance, depart on a Friday or Thursday and return on a Friday

Cheap flight deals from Dulles Intl to Niagara Falls

Cheapest flights from Dulles Intl to Niagara Falls
Explore the most affordable flight options available from Dulles Intl to Niagara Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 5, 2026.

This Flightnetwork deal was found by Cheapflights users on 3/2. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/99:00 am
IAD
-
YYZ
Nonstop1h 27m
Air Canada
Mon 4/136:55 pm
YYZ
-
IAD
Nonstop1h 34m
Air Canada
Deal found 3/2$219
This Flightnetwork deal was found by Cheapflights users on 2/28. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/74:30 pm
IAD
-
YYZ
Nonstop1h 27m
Air Canada
Mon 4/136:55 pm
YYZ
-
IAD
Nonstop1h 34m
Air Canada
Deal found 2/28$233
This Mytrip deal was found by Cheapflights users on 2/28. 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.
Wed 4/154:30 pm
IAD
-
YYZ
Nonstop1h 27m
Air Canada
Wed 4/222:05 pm
YYZ
-
IAD
Nonstop1h 34m
Air Canada
Deal found 2/28$247
This Air Canada deal was found by Cheapflights users on 3/2. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/174:30 pm
IAD
-
YYZ
Nonstop1h 27m
Air Canada
Mon 4/201:00 pm
YYZ
-
IAD
1 stop6h 40m
Air Canada
Deal found 3/2$265
This Air Canada deal was found by Cheapflights users on 3/2. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/284:30 pm
IAD
-
YYZ
Nonstop1h 27m
Air Canada
Tue 5/56:55 pm
YYZ
-
IAD
Nonstop1h 34m
Air Canada
Deal found 3/2$268
This Air Canada deal was found by Cheapflights users on 2/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/29:55 am
IAD
-
YYZ
Nonstop1h 27m
Air Canada
Sun 5/31:55 pm
YYZ
-
IAD
Nonstop1h 34m
Air Canada
Deal found 2/28$278
This Delta deal was found by Cheapflights users on 3/2. 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.
Thu 4/166:00 am
IAD
-
YYZ
1 stop7h 24m
Delta
Sat 4/182:15 pm
YYZ
-
IAD
1 stop8h 48m
Delta
Deal found 3/2$282

Find flight deals from Dulles Intl to Niagara Falls

Keep the following information in mind while searching for Dulles Intl to Niagara Falls flight deals. Data was last updated March 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$219
(Flightnetwork)

One-way from

$102
(Air Canada)

Popular in

October

Cheapest in

September

Average price

$325
Provider with most accurate pricing for Washington, D.C. (WAS)-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Toronto (YTO) flights.
Search Deals
From Washington, D.C. Dulles Intl to Niagara Falls
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Niagara Falls
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Niagara Falls 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 March 5, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Niagara Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Wed 5/13

6:00 am-11:19 am

1 stop5h 19m

Toronto Pearson Intl

Tue 6/16

6:08 pm-10:59 pm

1 stop4h 51m

$325

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Mon 5/4

5:07 pm-10:56 pm

1 stop5h 49m

Toronto Pearson Intl

Sat 5/9

6:00 am-12:23 pm

1 stop6h 23m

$329

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Thu 7/2

6:00 am-1:25 pm

1 stop7h 25m

Toronto Pearson Intl

Sat 7/11

2:15 pm-10:59 pm

1 stop8h 44m

$342

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Tue 3/31

6:00 am-11:23 am

1 stop5h 23m

Toronto Pearson Intl

Sun 4/5

12:15 pm-4:52 pm

1 stop4h 37m

$352

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Thu 6/11

6:00 am-1:25 pm

1 stop7h 25m

Toronto Pearson Intl

Sun 6/14

6:00 am-11:51 am

1 stop5h 51m

$362

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Tue 3/17

6:00 am-11:23 am

1 stop5h 23m

Toronto Pearson Intl

Thu 4/2

3:59 pm-10:59 pm

1 stop7h 00m

$385

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Mon 5/4

5:17 pm-7:02 pm

Nonstop1h 45m

Toronto Pearson Intl

Sat 5/9

2:35 pm-4:14 pm

Nonstop1h 39m

$396

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Fri 4/24

6:00 am-11:43 am

1 stop5h 43m

Toronto Pearson Intl

Sun 4/26

7:43 pm-9:25 pm

Nonstop1h 42m

$406

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Fri 5/15

6:00 am-1:30 pm

1 stop7h 30m

Toronto Pearson Intl

Tue 5/19

6:00 am-12:23 pm

1 stop6h 23m

$406

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Sun 3/15

1:19 pm-5:24 pm

1 stop4h 05m

Toronto Pearson Intl

Mon 3/30

6:08 pm-10:59 pm

1 stop4h 51m

$406

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/27

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Dulles Intl to Niagara Falls

Have a flexible travel schedule? Discover the best time to fly to Niagara Falls from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Niagara Falls

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Niagara Falls?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Niagara Falls. Price data was last updated on February 27, 2026.

The price you pay for your flight from Washington, D.C. Dulles Intl Airport to Niagara Falls may vary depending on when you book. For the best chance of a lower fare, look to book 75 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Niagara Falls?

Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Niagara Falls (average of $105). Flying from Washington, D.C. Dulles Intl Airport to Niagara Falls in May is currently the most expensive (average of $172). 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 IAD to NI4?

Find hourly flight availability from Dulles Intl to Niagara Falls. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 5, 2026.

A simple way to save on the total cost of your ticket is to fly from Washington, D.C. Dulles Intl Airport to Niagara Falls at noon. If you’re flexible enough to do this you can expect to save up to 20% on your trip compared to booking a flight in the evening.

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Niagara Falls?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Niagara Falls. Price data was last updated on February 21, 2026.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Niagara Falls flight should consider departing on Sunday mornings when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Niagara Falls

Get insights into the airlines that provide service to Niagara Falls. 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 Niagara Falls. Reviews last updated March 5, 2026.
Get a feel of what it's like to fly with Porter Airlines, United Airlines, and Air Canada from Washington, D.C. Dulles Intl Airport to Niagara Falls by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
421 reviews

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

8.0

Entertainment

7.0

Food

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!
Porter Airlines
8.0
Very good
421 reviews
Porter Airlines
8.0
Very good
421 reviews

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

8.0

Entertainment

7.0

Food

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!
United Airlines
7.4
Good
9,388 reviews
Porter Airlines
8.0
Very good
421 reviews

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

8.0

Entertainment

7.0

Food

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!
Air Canada
7.1
Good
10,776 reviews
Porter Airlines
8.0
Very good
421 reviews

Boarding

8.2

Overall

8.0

Crew

8.6

Comfort

8.0

Entertainment

7.0

Food

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Feb 2026

YYJ - YYZ

Always great! The Flight Attendants are always polite and attentive! The Polite was great and reminded us all that it was Valentine's Day!

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Niagara Falls. 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 Washington, D.C. Dulles Intl Airport to Niagara Falls?

    For as low as $325, Delta can have you in Niagara Falls from Washington, D.C. Dulles Intl Airport in 5h 19m. The distance from Washington, D.C. Dulles Intl Airport to Niagara Falls is about 346 mi.

  • What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to Niagara Falls?

    The top 3 most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Niagara Falls are ANA (79%), Copa Airlines (75%) and Republic Airways (75%).

  • What are the cheapest flights from Washington, D.C. Dulles Intl Airport to Niagara Falls?

    Looking for the cheapest flight from Washington, D.C. Dulles Intl Airport to Niagara Falls? While on average our users pay $1,163, our data indicates the cheapest price to be $118. The most popular route (Washington, D.C. Dulles Intl - Toronto Pearson Intl), is priced around $271.

  • Can I find deals for flights from Dulles Intl to Niagara Falls that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Niagara Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Niagara Falls?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Niagara Falls.

  • Can I find deals for business class flights from Dulles Intl to Niagara Falls?

    Yes. Cheapflights offers flight deals from Dulles Intl to Niagara Falls 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 Washington, D.C. Dulles Intl Airport to Niagara Falls?

    Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Niagara Falls (average of $105). Flying from Washington, D.C. Dulles Intl Airport to Niagara Falls in May is currently the most expensive (average of $172). 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 4 airlines flying from Dulles Intl to Niagara Falls

Discover the top 4 airlines that operate flights from Dulles Intl to Niagara Falls. 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 March 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$54Average$237FlexibilityNo cancel feeOn-time52%
Air TransatCheapest$176Average$220FlexibilityNo cancel feeOn-time50%
Air CanadaCheapest$187Average$346FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$236Average$353FlexibilityNo cancel feeOn-time69%

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