HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Niagara Falls

$97+ 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 6/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YYZ
Jun 10 — Jun 171
Wed 6/10
Wed 6/17
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 August, booked 79 days in advance, depart on a Thursday or Friday and return on a Wednesday

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 May 11, 2026.

This United Airlines deal was found by Cheapflights users on 5/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2710:31 am
IAD
-
YYZ
1 stop5h 15m
United Airlines
Wed 5/277:43 pm
YYZ
-
IAD
Nonstop1h 43m
United Airlines
Deal found 5/10$231
This United Airlines deal was found by Cheapflights users on 5/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/38:25 am
IAD
-
YYZ
Nonstop1h 39m
United Airlines
Wed 6/31:00 pm
YYZ
-
IAD
1 stop6h 02m
United Airlines
Deal found 5/8$237
This Kissandfly.com deal was found by Cheapflights users on 5/7. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/1310:14 pm
IAD
-
YYZ
Nonstop1h 40m
Lufthansa
Sun 6/149:35 am
YYZ
-
IAD
Nonstop1h 36m
Lufthansa
Deal found 5/7$240
This United Airlines deal was found by Cheapflights users on 5/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2710:14 pm
IAD
-
YYZ
Nonstop1h 40m
United Airlines
Tue 6/29:35 am
YYZ
-
IAD
Nonstop1h 36m
United Airlines
Deal found 5/11$246
This Air Canada deal was found by Cheapflights users on 5/11. 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.
Wed 5/279:45 am
IAD
-
YYZ
1 stop4h 53m
Air Canada
Tue 6/26:55 pm
YYZ
-
IAD
Nonstop1h 34m
Air Canada
Deal found 5/11$255
This United Airlines deal was found by Cheapflights users on 5/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2610:31 am
IAD
-
YYZ
1 stop7h 25m
United Airlines
Thu 5/287:43 pm
YYZ
-
IAD
Nonstop1h 43m
United Airlines
Deal found 5/11$256
This Kissandfly.com deal was found by Cheapflights users on 5/6. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/510:14 pm
IAD
-
YYZ
Nonstop1h 40m
Lufthansa
Mon 6/87:43 pm
YYZ
-
IAD
Nonstop1h 43m
Lufthansa
Deal found 5/6$257
This Mytrip deal was found by Cheapflights users on 5/11. 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.
Mon 7/133:45 pm
IAD
-
YYZ
1 stop6h 10m
Air Canada
Wed 7/151:55 pm
YYZ
-
IAD
Nonstop1h 29m
Air Canada
Deal found 5/11$259
This United Airlines deal was found by Cheapflights users on 5/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2610:14 pm
IAD
-
YYZ
Nonstop1h 40m
United Airlines
Fri 6/57:30 am
YYZ
-
IAD
1 stop3h 58m
United Airlines
Deal found 5/6$262
This Flysmarter deal was found by Cheapflights users on 5/9. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/289:55 am
IAD
-
YYZ
Nonstop1h 27m
Multiple Airlines
Mon 6/112:45 pm
YYZ
-
IAD
Nonstop1h 36m
Multiple Airlines
Deal found 5/9$263

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 May 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$231
(United Airlines)

One-way from

$97
(United Airlines)

Popular in

March

Cheapest in

September

Average price

$375
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 ($27 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 May 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 May 11, 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

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Mon 6/8

10:14 pm-11:54 pm

Nonstop1h 40m

Toronto Pearson Intl

Tue 6/9

7:43 pm-9:26 pm

Nonstop1h 43m

$246

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Fri 6/5

6:00 am-1:30 pm

1 stop7h 30m

Toronto Pearson Intl

Mon 6/8

2:29 pm-11:14 pm

1 stop8h 45m

$271

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Tue 6/16

8:18 am-1:05 pm

1 stop4h 47m

Toronto Pearson Intl

Thu 6/18

12:55 pm-4:20 pm

1 stop3h 25m

$321

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Sat 6/13

10:14 pm-11:54 pm

Nonstop1h 40m

Toronto Pearson Intl

Tue 7/14

12:45 pm-2:21 pm

Nonstop1h 36m

$331

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Mon 8/10

10:14 pm-11:54 pm

Nonstop1h 40m

Toronto Pearson Intl

Wed 8/12

7:43 pm-9:24 pm

Nonstop1h 41m

$354
Quickest round-trip

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Sat 8/8

10:14 pm-11:54 pm

Nonstop1h 40m

Toronto Pearson Intl

Thu 8/13

12:45 pm-2:10 pm

Nonstop1h 25m

$354

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Tue 8/11

10:35 am-3:46 pm

1 stop5h 11m

Toronto Pearson Intl

Fri 8/14

2:30 pm-4:07 pm

Nonstop1h 37m

$364

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Thu 6/18

10:10 pm-6:18 am

1 stop8h 08m

Toronto Pearson Intl

Sun 6/21

12:05 pm-9:13 pm

1 stop9h 08m

$377

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Sat 8/22

1:10 pm-8:44 pm

1 stop7h 34m

Toronto Pearson Intl

Mon 8/24

10:15 am-4:01 pm

1 stop5h 46m

$379

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Mon 8/17

5:15 pm-12:06 am

1 stop6h 51m

Toronto Pearson Intl

Fri 8/21

7:00 am-11:52 am

1 stop4h 52m

$379

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/10

Showing 1-10 of 23 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 May 11, 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 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 May 9, 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. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 May 11, 2026.

The most flights from IAD to NI4 are scheduled on a Monday (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?

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 May 11, 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
436 reviews

Overall

8.0

Boarding

8.2

Crew

8.6

Comfort

8.0

Entertainment

7.0

Food

7.6

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Porter Airlines
8.0
Very good
436 reviews
Porter Airlines
8.0
Very good
436 reviews

Overall

8.0

Boarding

8.2

Crew

8.6

Comfort

8.0

Entertainment

7.0

Food

7.6

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Delta
7.9
Good
8,453 reviews
Porter Airlines
8.0
Very good
436 reviews

Overall

8.0

Boarding

8.2

Crew

8.6

Comfort

8.0

Entertainment

7.0

Food

7.6

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
United Airlines
7.4
Good
9,700 reviews
Porter Airlines
8.0
Very good
436 reviews

Overall

8.0

Boarding

8.2

Crew

8.6

Comfort

8.0

Entertainment

7.0

Food

7.6

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.
Air Canada
7.1
Good
11,017 reviews
Porter Airlines
8.0
Very good
436 reviews

Overall

8.0

Boarding

8.2

Crew

8.6

Comfort

8.0

Entertainment

7.0

Food

7.6

Reviews

1 / 20
10.0
Excellent

John,Mar 2026

YYZ - PVR

I'm 6ft 4in. The seats don't have enough room. But was a good flight.

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 $246, 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 (84%), Republic Airways (81%) and Air Canada (79%).

  • 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 $1,044, our data indicates the cheapest price to be $96. The most popular route (Washington, D.C. Dulles Intl - Toronto Pearson Intl), is priced around $246.

  • 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 May 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$54Average$235FlexibilityNo cancel feeOn-time52%
DeltaCheapest$100Average$254FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$209Average$364FlexibilityNo cancel feeOn-time67%
Air TransatCheapest$211Average$246FlexibilityNo cancel feeOn-time50%
United AirlinesCheapest$251Average$374FlexibilityNo 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.