The best month to fly to Niagara Falls is in August. The average ticket price for round-trip flights is $255 in August, which is a 6% decrease from the previous month. The second best month to fly to Niagara Falls in September. The average ticket price for round-trip flights is $268, which is a 1% increase from the previous month. The third best month to fly there in October. During this time, you can expect to pay an average of $279 for your flight ticket – a 3% increase from the previous year’s numbers! And lastly, November isn’t too shabby either! You’ll spend about $284 on your round-trip flight if you book it around that time of year—a 4% increase from last year’s average ticket price but still way cheaper than what we saw during peak season (March).