HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Niagara Falls

$113+ 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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YYZ
Jul 28 — Aug 41
Tue 7/28
Tue 8/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Niagara Falls with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Niagara Falls are usually found in September or January, booked 79 days in advance, depart on a Thursday or Friday 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 June 28, 2026.

This Air Canada deal was found by Cheapflights users on 6/25. 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 9/194:00 pm
IAD
-
YYZ
Nonstop1h 25m
Air Canada
Mon 9/216:55 pm
YYZ
-
IAD
Nonstop1h 30m
Air Canada
Deal found 6/25$277
This Booking.com deal was found by Cheapflights users on 6/25. 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.
Tue 7/144:20 pm
IAD
-
YYZ
Nonstop1h 30m
Air Canada
Thu 7/161:55 pm
YYZ
-
IAD
Nonstop1h 29m
Air Canada
Deal found 6/25$279
This Trip.com deal was found by Cheapflights users on 6/25. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/149:55 am
IAD
-
YYZ
Nonstop1h 30m
Air Canada
Fri 7/171:55 pm
YYZ
-
IAD
Nonstop1h 29m
Air Canada
Deal found 6/25$282
This Trip.com deal was found by Cheapflights users on 6/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/24:20 pm
IAD
-
YYZ
Nonstop1h 30m
Air Canada
Thu 8/61:55 pm
YYZ
-
IAD
Nonstop1h 29m
Air Canada
Deal found 6/26$284
This Air Canada deal was found by Cheapflights users on 6/25. 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 9/14:20 pm
IAD
-
YYZ
Nonstop1h 30m
Air Canada
Sat 9/56:55 pm
YYZ
-
IAD
Nonstop1h 29m
Air Canada
Deal found 6/25$287
This Mytrip deal was found by Cheapflights users on 6/25. 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.
Sat 8/84:20 pm
IAD
-
YYZ
Nonstop1h 30m
Air Canada
Fri 8/141:55 pm
YYZ
-
IAD
Nonstop1h 29m
Air Canada
Deal found 6/25$290
This Mytrip deal was found by Cheapflights users on 6/27. 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 8/94:20 pm
IAD
-
YYZ
Nonstop1h 30m
Air Canada
Wed 8/121:55 pm
YYZ
-
IAD
Nonstop1h 29m
Air Canada
Deal found 6/27$292
This Air Canada deal was found by Cheapflights users on 6/25. 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 9/199:45 am
IAD
-
YYZ
1 stop4h 48m
Air Canada
Sat 9/2610:30 am
YYZ
-
IAD
1 stop4h 30m
Air Canada
Deal found 6/25$294
This Kiwi.com deal was found by Cheapflights users on 6/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/126:09 pm
IAD
-
YYZ
1 stop22h 46m
Multiple Airlines
Mon 8/249:30 am
YYZ
-
IAD
1 stop10h 14m
Multiple Airlines
Deal found 6/26$295
This Air Canada deal was found by Cheapflights users on 6/25. 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 8/224:20 pm
IAD
-
YYZ
Nonstop1h 30m
Air Canada
Sun 9/610:30 am
YYZ
-
IAD
1 stop4h 25m
Air Canada
Deal found 6/25$296
This Air Canada deal was found by Cheapflights users on 6/25. 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.
Mon 7/139:55 am
IAD
-
YYZ
Nonstop1h 30m
Air Canada
Wed 7/221:55 pm
YYZ
-
IAD
Nonstop1h 29m
Air Canada
Deal found 6/25$298

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 June 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$277
(Air Canada)

One-way from

$113
(Air Canada)

Popular in

June

Cheapest in

September

Average price

$434
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
Highest demand for flights based on searches. 7% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 28, 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

Cheapest round-trip
Quickest round-trip

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Fri 7/24

10:14 pm-11:54 pm

Nonstop1h 40m

Toronto Pearson Intl

Fri 7/31

12:45 pm-2:21 pm

Nonstop1h 36m

$363

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Sat 8/1

5:15 pm-7:02 pm

Nonstop1h 47m

Toronto Pearson Intl

Tue 8/4

11:00 am-4:30 pm

1 stop5h 30m

$378

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Sat 7/25

5:15 pm-7:02 pm

Nonstop1h 47m

Toronto Pearson Intl

Sun 7/26

9:35 am-11:11 am

Nonstop1h 36m

$384

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Thu 9/24

6:10 am-1:34 pm

1 stop7h 24m

Toronto Pearson Intl

Sun 9/27

6:00 am-10:21 am

1 stop4h 21m

$388

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Fri 7/24

10:14 pm-11:54 pm

Nonstop1h 40m

Toronto Pearson Intl

Wed 7/29

7:00 am-11:52 am

1 stop4h 52m

$400

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Sat 7/25

5:18 pm-11:02 pm

1 stop5h 44m

Toronto Pearson Intl

Sat 8/8

6:00 am-11:49 am

1 stop5h 49m

$409

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Fri 8/21

3:40 pm-8:44 pm

1 stop5h 04m

Toronto Pearson Intl

Sun 8/23

7:00 am-11:52 am

1 stop4h 52m

$409

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Tue 8/4

5:25 pm-11:03 pm

1 stop5h 38m

Toronto Pearson Intl

Wed 8/19

12:15 pm-6:33 pm

1 stop6h 18m

$420

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Mon 7/27

6:00 am-1:34 pm

1 stop7h 34m

Toronto Pearson Intl

Thu 7/30

6:10 am-10:23 am

1 stop4h 13m

$420

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Sun 7/19

8:18 am-1:08 pm

1 stop4h 50m

Toronto Pearson Intl

Mon 7/20

4:05 pm-9:13 pm

1 stop5h 08m

$422

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/23

Showing 1-10 of 22 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

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 June 28, 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 18% on your trip compared to booking a flight in the afternoon.

Weekly flight availability from Washington, D.C. Dulles Intl Airport to Niagara Falls

Explore weekly flight availability from Dulles Intl to Niagara Falls. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 28, 2026.

The most flights from IAD to NI4 are scheduled on a Tuesday (19 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 on average).

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Niagara Falls?

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 June 27, 2026.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Niagara Falls flight should consider departing on Friday at noon when fares are most often at their lowest. Sunday 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 June 28, 2026.
Get a feel of what it's like to fly with Porter Airlines,Delta, andUnited Airlines 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
441 reviews

Boarding

8.2

Entertainment

6.9

Food

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

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
441 reviews
Porter Airlines
8.0
Very good
441 reviews

Boarding

8.2

Entertainment

6.9

Food

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

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!
Delta
7.8
Good
8,451 reviews
Porter Airlines
8.0
Very good
441 reviews

Boarding

8.2

Entertainment

6.9

Food

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

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
9,896 reviews
Porter Airlines
8.0
Very good
441 reviews

Boarding

8.2

Entertainment

6.9

Food

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

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
11,270 reviews
Porter Airlines
8.0
Very good
441 reviews

Boarding

8.2

Entertainment

6.9

Food

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

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 $363, United Airlines can have you in Niagara Falls from Washington, D.C. Dulles Intl Airport in 1h 40m. The distance from Washington, D.C. Dulles Intl Airport to Niagara Falls is about 346 mi. This flight may include one or multiple stops.

  • 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 (90%), United Airlines (85%) and Republic Airways (85%).

  • 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 $2,176, our data indicates the cheapest price to be $166. The most popular route (Washington, D.C. Dulles Intl - Toronto Pearson Intl), is priced around $290.

  • 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 5 airlines flying from Dulles Intl to Niagara Falls

Discover the top 5 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 June 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$54Average$240FlexibilityNo cancel feeOn-time52%
DeltaCheapest$106Average$189FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$182Average$367FlexibilityNo cancel feeOn-time67%
Air TransatCheapest$211Average$263FlexibilityNo cancel feeOn-time50%
United AirlinesCheapest$261Average$399FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights