Flights from Ottawa to St Louis
Pick a departure date to see flights and seller prices
We search agencies and airlines for your day: nonstop and connecting flights, baggage, departure and arrival times.
Where to connect
Options with one connection, fastest first
- fastest, via Toronto
- 6h 23m
- two tickets, via New York
- $336
- connection options
- 5
- straight-line distance
- 877 mi (1,412 km)
fastest
Via Toronto
6h 23m
with the connection
Ottawa to Toronto
flight 1h 10m
Connection of about 3h
Arrival: Pearson International, Toronto City Centre. Departure to St Louis: Pearson International.
Toronto to St Louis
flight 2h 13m
Via Chicago
United States
7h 8m
with the connection
two ticketsfrom $554
Via Washington
United States
7h 23m
with the connection
Ottawa to Washington
flight 1h 53m
Connection of about 3h
Arrival: Ronald Reagan National, Washington Dulles International. Departure to St Louis: Baltimore/Wash International Thurgood Marshall, Ronald Reagan National, Washington Dulles International.
Washington to St Louis
flight 2h 30m
Via New York
United States
7h 31m
with the connection
Ottawa to New York
flight 1h 36m
Connection of about 3h
Arrival: Newark Liberty International. Departure to St Louis: LaGuardia, Newark Liberty International.
New York to St Louis
flight 2h 55m
two ticketsfrom $336
Via Cleveland
United States
9h 43m
with the connection
One ticket or two
How the options are calculated and what to keep in mind at the connection
Flight times come from the nonstop schedule (estimated from the distance where there is no schedule), with 3h allowed for the connection. The price of an option is the sum of the lowest known fares for each leg; their dates may not match, so treat it as a guide. The search shows tickets for your dates, including connections on a single ticket.
Nearest nonstop flights
The closest you can get without a connection
From Ottawa to cities closest to St Louis
Ottawa to Chicago
Chicago: 262 mi (422 km) from St Louis, flight 2h 44m
from $423
Ottawa to Cleveland
Cleveland: 492 mi (791 km) from St Louis, flight 5h
Ottawa to Toronto
Toronto: 661 mi (1,063 km) from St Louis, flight 1h 10m
from $145
Ottawa to Thunder Bay
Thunder Bay: 675 mi (1,087 km) from St Louis, flight 2h 32m
from $237
Ottawa to Washington
Washington: 709 mi (1,141 km) from St Louis, flight 1h 53m
from $350
Ottawa to Winnipeg
Winnipeg: 850 mi (1,368 km) from St Louis, flight 2h 56m
from $141
To St Louis from cities closest to Ottawa
Toronto to St Louis
Toronto: 218 mi (351 km) from Ottawa, flight 2h 13m
Boston to St Louis
Boston: 313 mi (503 km) from Ottawa, flight 3h 10m
from $173
New York to St Louis
New York: 336 mi (540 km) from Ottawa, flight 2h 55m
from $141
Philadelphia to St Louis
Philadelphia: 378 mi (609 km) from Ottawa, flight 2h 36m
from $320
Cleveland to St Louis
Cleveland: 404 mi (650 km) from Ottawa, flight 1h 43m
from $170
Pittsburgh to St Louis
Pittsburgh: 406 mi (654 km) from Ottawa, flight 1h 50m
from $141
Frequently asked questions
Is there a nonstop flight from Ottawa to St Louis?
There are no nonstop flights in the schedule. You will need a connection, the fastest is via Toronto.
What is the fastest way to fly from Ottawa to St Louis?
Via Toronto: 1h 10m to the connection, 2h 13m after it, about 6h 23m in total with 3h for the connection.
How much does a flight from Ottawa to St Louis with a connection cost?
Two nonstop tickets via New York from $336. This is the sum of the lowest known prices for each leg, and their dates may not match.
Which cities can you connect in between Ottawa and St Louis?
Toronto (6h 23m total), Chicago (7h 8m total), Washington (7h 23m total), New York (7h 31m total) and Cleveland (9h 43m total).
How far is St Louis from Ottawa?
877 mi (1,412 km) in a straight line between the cities.
How much time should I allow for the connection?
The options allow 3h. On a single ticket the carrier is responsible for the connection; on separate tickets you set the margin yourself, allowing time to collect and re-check your bags.