Need help booking?
Unpublished phone-only deals available
IAG to SFO: distance & flight time
Niagara Falls (Niagara Falls International Airport) → San Francisco (San Francisco International Airport)
2,291 mi
3,688 km · 1,991 nm
4h 58m
estimated nonstop flight time
-3h
time difference · heading west
See live IAG→SFO fares Phone-only fares on this route — call free
Flight time details
2,291 miles nonstop takes roughly 4h 58m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time set-back when reading arrival times on your ticket.
The two airports
- IAG — Niagara Falls International Airport · Niagara Falls, United States
- SFO — San Francisco International Airport · San Francisco, United States
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near IAG
- YYZ · Lester B. Pearson International Airport52 mi away
- YCM · Niagara District Airport13 mi away
- BUF · Buffalo Niagara International Airport16 mi away
- DU9 · Dunnville Airport37 mi away
Near SFO
- SQL · San Carlos Airport10 mi away
- HAF · Half Moon Bay Airport10 mi away
- OAK · Metropolitan Oakland International Airport11 mi away
- NGZ · Alameda Naval Air Station12 mi away
Frequently asked questions
How far is IAG from SFO?
The flight distance from Niagara Falls (IAG) to San Francisco (SFO) is 2,291 miles (3,688 km, 1,991 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAG to SFO?
A nonstop flight takes about 4h 58m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from IAG to SFO?
Nonstop service on IAG–SFO depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 4h 58m nonstop estimate.
What is the time difference between Niagara Falls and San Francisco?
San Francisco is 3 hours behind Niagara Falls.
What is the cheapest way to fly from IAG to SFO?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAG–SFO that never appear on search engines, with no booking fees.
Why are some IAG to SFO fares phone-only?
Consolidator contracts let us sell certain IAG–SFO tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.