Flights from Denver to Niagara Falls (DEN to IAG)

Discover more affordable dates and routes for flights from Denver to Niagara Falls (DEN to IAG) within a date range.

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  • US$474
    Frontier AirlinesAllegiant AirAllegiant Air
    6:00am - 8:38am
    Sat Nov 22nd 2025
    24h 38m
    Denver (DEN) → Niagara Falls (IAG)
    2 Stops

    Sat Nov 22nd 2025 Frontier Airlines · F9 3286 Depart at 6:00am from Denver (DEN) Fly for 2h 46m Arrive at 10:46am in Cincinnati (CVG)

    Layover in Cincinnati for 2h 53m

    Sat Nov 22nd 2025 Allegiant Air · G4 407 Depart at 1:39pm from Cincinnati (CVG) Fly for 2h 8m Arrive at 3:47pm in Tampa (PIE)

    Layover in Tampa for 14h 13m

    Sun Nov 23rd 2025 Allegiant Air · G4 1008 Depart at 6:00am from Tampa (PIE) Fly for 2h 38m Arrive at 8:38am in Niagara Falls (IAG)

  • US$501
    Frontier AirlinesAllegiant AirAllegiant AirAllegiant Air
    7:00am - 12:00pm
    Fri Nov 21st 2025
    27h 0m
    Denver (DEN) → Niagara Falls (IAG)
    3 Stops

    Fri Nov 21st 2025 Frontier Airlines · F9 2015 Depart at 7:00am from Denver (DEN) Fly for 2h 7m Arrive at 8:07am in Las Vegas (LAS)

    Layover in Las Vegas for 2h 39m

    Fri Nov 21st 2025 Allegiant Air · G4 3060 Depart at 10:46am from Las Vegas (LAS) Fly for 3h 46m Arrive at 5:32pm in Knoxville (TYS)

    Layover in Knoxville for 3h 53m

    Fri Nov 21st 2025 Allegiant Air · G4 2552 Depart at 9:25pm from Knoxville (TYS) Fly for 1h 52m Arrive at 11:17pm in Punta Gorda (PGD)

    Layover in Punta Gorda for 9h 53m

    Sat Nov 22nd 2025 Allegiant Air · G4 903 Depart at 9:10am from Punta Gorda (PGD) Fly for 2h 50m Arrive at 12:00pm in Niagara Falls (IAG)

  • US$604
    Frontier AirlinesAllegiant AirAllegiant AirAllegiant Air
    10:40pm - 10:20am
    Sat Nov 22nd 2025
    33h 40m
    Denver (DEN) → Niagara Falls (IAG)
    3 Stops

    Sat Nov 22nd 2025 Frontier Airlines · F9 777 Depart at 10:40pm from Denver (DEN) Fly for 2h 7m Arrive at 11:47pm in Las Vegas (LAS)

    Layover in Las Vegas for 6h 38m

    Sun Nov 23rd 2025 Allegiant Air · G4 83 Depart at 6:25am from Las Vegas (LAS) Fly for 3h 37m Arrive at 1:02pm in Grand Rapids (GRR)

    Layover in Grand Rapids for 3h 58m

    Sun Nov 23rd 2025 Allegiant Air · G4 555 Depart at 5:00pm from Grand Rapids (GRR) Fly for 2h 53m Arrive at 7:53pm in Punta Gorda (PGD)

    Layover in Punta Gorda for 11h 37m

    Mon Nov 24th 2025 Allegiant Air · G4 859 Depart at 7:30am from Punta Gorda (PGD) Fly for 2h 50m Arrive at 10:20am in Niagara Falls (IAG)

  • US$391
    Frontier AirlinesAllegiant AirAllegiant Air
    8:00pm - 8:38am
    Fri Nov 21st 2025
    34h 38m
    Denver (DEN) → Niagara Falls (IAG)
    2 Stops

    Fri Nov 21st 2025 Frontier Airlines · F9 1752 Depart at 8:00pm from Denver (DEN) Fly for 2h 39m Arrive at 12:39am in Cincinnati (CVG)

    Layover in Cincinnati for 13h 0m

    Sat Nov 22nd 2025 Allegiant Air · G4 407 Depart at 1:39pm from Cincinnati (CVG) Fly for 2h 8m Arrive at 3:47pm in Tampa (PIE)

    Layover in Tampa for 14h 13m

    Sun Nov 23rd 2025 Allegiant Air · G4 1008 Depart at 6:00am from Tampa (PIE) Fly for 2h 38m Arrive at 8:38am in Niagara Falls (IAG)

  • US$509
    Frontier AirlinesAllegiant AirAllegiant Air
    8:00pm - 10:20am
    Sat Nov 22nd 2025
    36h 20m
    Denver (DEN) → Niagara Falls (IAG)
    2 Stops

    Sat Nov 22nd 2025 Frontier Airlines · F9 1752 Depart at 8:00pm from Denver (DEN) Fly for 2h 39m Arrive at 12:39am in Cincinnati (CVG)

    Layover in Cincinnati for 5h 51m

    Sun Nov 23rd 2025 Allegiant Air · G4 423 Depart at 6:30am from Cincinnati (CVG) Fly for 2h 20m Arrive at 8:50am in Punta Gorda (PGD)

    Layover in Punta Gorda for 22h 40m

    Mon Nov 24th 2025 Allegiant Air · G4 859 Depart at 7:30am from Punta Gorda (PGD) Fly for 2h 50m Arrive at 10:20am in Niagara Falls (IAG)

  • US$689
    Frontier AirlinesFrontier AirlinesAllegiant AirAllegiant Air
    6:08pm - 8:38am
    Fri Nov 21st 2025
    36h 30m
    Denver (DEN) → Niagara Falls (IAG)
    3 Stops

    Fri Nov 21st 2025 Frontier Airlines · F9 4920 Depart at 6:08pm from Denver (DEN) Fly for 3h 45m Arrive at 11:53pm in Orlando (MCO)

    Layover in Orlando for 6h 7m

    Sat Nov 22nd 2025 Frontier Airlines · F9 1539 Depart at 6:00am from Orlando (MCO) Fly for 2h 37m Arrive at 8:37am in Indianapolis (IND)

    Layover in Indianapolis for 2h 32m

    Sat Nov 22nd 2025 Allegiant Air · G4 602 Depart at 11:09am from Indianapolis (IND) Fly for 2h 15m Arrive at 1:24pm in Tampa (PIE)

    Layover in Tampa for 16h 36m

    Sun Nov 23rd 2025 Allegiant Air · G4 1008 Depart at 6:00am from Tampa (PIE) Fly for 2h 38m Arrive at 8:38am in Niagara Falls (IAG)

  • US$520
    Frontier AirlinesAllegiant AirAllegiant Air
    2:57pm - 8:38am
    Fri Nov 21st 2025
    39h 41m
    Denver (DEN) → Niagara Falls (IAG)
    2 Stops

    Fri Nov 21st 2025 Frontier Airlines · F9 2348 Depart at 2:57pm from Denver (DEN) Fly for 2h 29m Arrive at 7:26pm in Indianapolis (IND)

    Layover in Indianapolis for 15h 43m

    Sat Nov 22nd 2025 Allegiant Air · G4 602 Depart at 11:09am from Indianapolis (IND) Fly for 2h 15m Arrive at 1:24pm in Tampa (PIE)

    Layover in Tampa for 16h 36m

    Sun Nov 23rd 2025 Allegiant Air · G4 1008 Depart at 6:00am from Tampa (PIE) Fly for 2h 38m Arrive at 8:38am in Niagara Falls (IAG)

  • US$407
    Frontier AirlinesAllegiant AirAllegiant AirAllegiant Air
    11:45am - 8:38am
    Fri Nov 21st 2025
    42h 53m
    Denver (DEN) → Niagara Falls (IAG)
    3 Stops

    Fri Nov 21st 2025 Frontier Airlines · F9 2210 Depart at 11:45am from Denver (DEN) Fly for 2h 23m Arrive at 3:08pm in Chicago (MDW)

    Layover in Chicago for 4h 28m

    Fri Nov 21st 2025 Allegiant Air · G4 1849 Depart at 7:36pm from Chicago (MDW) Fly for 1h 33m Arrive at 10:09pm in Asheville (AVL)

    Layover in Asheville for 14h 36m

    Sat Nov 22nd 2025 Allegiant Air · G4 244 Depart at 12:45pm from Asheville (AVL) Fly for 1h 41m Arrive at 2:26pm in Tampa (PIE)

    Layover in Tampa for 15h 34m

    Sun Nov 23rd 2025 Allegiant Air · G4 1008 Depart at 6:00am from Tampa (PIE) Fly for 2h 38m Arrive at 8:38am in Niagara Falls (IAG)

  • US$545
    Frontier AirlinesAllegiant AirAllegiant AirAllegiant Air
    9:59am - 8:38am
    Fri Nov 21st 2025
    44h 39m
    Denver (DEN) → Niagara Falls (IAG)
    3 Stops

    Fri Nov 21st 2025 Frontier Airlines · F9 1993 Depart at 9:59am from Denver (DEN) Fly for 2h 7m Arrive at 11:06am in Las Vegas (LAS)

    Layover in Las Vegas for 5h 11m

    Fri Nov 21st 2025 Allegiant Air · G4 1542 Depart at 4:17pm from Las Vegas (LAS) Fly for 3h 44m Arrive at 11:01pm in Flint (FNT)

    Layover in Flint for 9h 29m

    Sat Nov 22nd 2025 Allegiant Air · G4 3175 Depart at 8:30am from Flint (FNT) Fly for 2h 51m Arrive at 11:21am in Tampa (PIE)

    Layover in Tampa for 18h 39m

    Sun Nov 23rd 2025 Allegiant Air · G4 1008 Depart at 6:00am from Tampa (PIE) Fly for 2h 38m Arrive at 8:38am in Niagara Falls (IAG)

  • US$383
    Frontier AirlinesAllegiant AirAllegiant AirAllegiant Air
    7:00am - 8:38am
    Fri Nov 21st 2025
    47h 38m
    Denver (DEN) → Niagara Falls (IAG)
    3 Stops

    Fri Nov 21st 2025 Frontier Airlines · F9 1375 Depart at 7:00am from Denver (DEN) Fly for 2h 9m Arrive at 9:09am in Phoenix (PHX)

    Layover in Phoenix for 7h 57m

    Fri Nov 21st 2025 Allegiant Air · G4 1102 Depart at 5:06pm from Phoenix (PHX) Fly for 4h 4m Arrive at 11:10pm in Pittsburgh (PIT)

    Layover in Pittsburgh for 18h 50m

    Sat Nov 22nd 2025 Allegiant Air · G4 1129 Depart at 6:00pm from Pittsburgh (PIT) Fly for 2h 26m Arrive at 8:26pm in Tampa (PIE)

    Layover in Tampa for 9h 34m

    Sun Nov 23rd 2025 Allegiant Air · G4 1008 Depart at 6:00am from Tampa (PIE) Fly for 2h 38m Arrive at 8:38am in Niagara Falls (IAG)

@sarahbb1
Sarah Belizaire
@sarahbb1

Have flexible travel plans or looking for alternative routes given the chaos? Check out all the connection possibilities via a super helpful site created by @ismaelyws flightlist.io thanks to @andy_travels for the recommendation #travel #flights

@eyupitsjohn
John Ford
@eyupitsjohn

There seem to be lots of sites launching at the moment that promise to find you cheap flights but not many have the professional finish of Flightlist by @ismaelyws #travel #flights

@oamingsonaa
Roaming Sonaa
@roamingsonaa

For people wanting to maximize their trips, Flightlist is my newest travel hack for uncovering the coolest routes at irresistible prices. No stress, no annoying ads — just seamless flight booking with amazing functionality.

@andy_travels
Andy Travels
@andy_travels

@ismaelyws Just tried out Flightlist for the first time. Really nice idea, well made, and just what I need at the moment 👍

@travelwitbender
Travel With Bender
@travelwitbender

Did you spot my recent article about how to score cheap one way flights? ✈️ FlightList is my new secret tool for discovering cheap routes, within a departure date range. Plus you can also search by country/region for departures & destinations. Powerful! 💪

@travel.with.wes
Wesley Mergard
@travel.with.wes

One useful tool I've found for evaluating different departure and return dates is called FlightList.io. You can quickly scan different travel date ranges, carriers and one way flight options to easily determine the cheapest flight combinations for your trip.

Explore Flight Options

FlightList Blog

Flightlist Interviews 7 Travel Experts On Why They Book One Way Flights
Flightlist Interviews 7 Travel Experts On Why They Book One Way Flights
Why I built FlightList & solved my own problem
Why I Built FlightList & Solved My Own Problem

About FlightList

❝Founded by a remote worker and frequent flyer, who discovered that the best deals come from searching with flexible dates across entire countries or regions. Our streamlined platform strips away the clutter found on typical travel sites, offering a clean interface that focuses solely on finding cost-effective flights. Unlike traditional booking sites, FlightList allows users to search by date ranges and broad destinations, unveiling opportunities that rigid parameters often miss. Our filters let travelers tailor searches to their specific needs, whether they're digital nomads seeking their next adventure or budget-conscious explorers maximizing travel funds. We've made finding cheap flights into a quicker and easier experience, empowering users to discover just how far their budget can take them.❞

Hans Desjarlais, Founder Hans Desjarlais Profile Picture