Cheap flights from St. Louis, MO to Ottawa, Canada
Flights starting at £106. Choose between Porter Airlines, Frontier Airlines, or Spirit Airlines to find the best price.
Make your travel wishlist, we'll do the rest
Hidden deals
Kiwi-Code uncovers prices airlines don't want you to see.
Effortless booking
Use our flexible filters to tailor your search.
Travel hacking
Look out for the travel hack star icon for even cheaper fares.
Tips to know when travelling to Ottawa
Cheapest one-way trip | £118 |
---|---|
Cheapest round-trip | £308 |
Average round-trip | £368 |
Includes rare itinerary | |
Most popular airline | Porter Airlines |
Receive exclusive deals by email
By subscribing you agree to receive offers according to the conditions described in our Privacy Policy.
The most popular airlines for this route are Porter Airlines, Frontier Airlines, Spirit Airlines, United Airlines, and Flair Airlines. St. Louis and Ottawa have 160 direct flights per week. When you arrive at Ottawa, consider visiting Island of Montreal, and Île Jésus.
Check-in for a flight from St. Louis to Ottawa
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
---|---|---|---|---|
Porter Airlines | POE | PD | Yes | 0 0 |
Frontier Airlines | FFT | F9 | No | Opens 24 days before flight Closes 1 hours before flight |
Spirit Airlines | NKS | NK | No | Opens 24 days before flight Closes 1 hours before flight |
United Airlines | UAL | UA | Yes | No |
Flair Airlines | FLE | F8 | Yes | Opens 24 days before flight Closes 1 hours before flight |
Weather in Ottawa
Average Weather
Month | Average monthly max temperature | Average monthly min temperature |
January | -5°C | -13°C |
February | -3°C | -12°C |
March | 2°C | -6°C |
April | 10°C | 0°C |
May | 18°C | 7°C |
June | 22°C | 12°C |
July | 25°C | 15°C |
August | 24°C | 14°C |
September | 20°C | 11°C |
October | 13°C | 5°C |
November | 5°C | -1°C |
December | -1°C | -7°C |
14 day forecast
Frequently asked questions
Planning a trip? Thanks to our Virtual Interlining algorithm, we offer billions of route combinations between any A and any B in the world by plane, train, and bus. Find the cheapest routes and best deals for you, as well as the best dates on which to travel.
Explore alternative trips
Flights from St. Louis
- Flights from St. Louis to London
- Flights from St. Louis to Manchester
- Flights from St. Louis to Las Vegas
- Flights from St. Louis to Dublin
- Flights from St. Louis to San Jose
- Flights from St. Louis to Orlando
- Flights from St. Louis to Tampa
- Flights from St. Louis to San Francisco
- Flights from St. Louis to Washington, D.C.
- Flights from St. Louis to Glasgow
- Flights from St. Louis to Houston
- Flights from St. Louis to Minneapolis
- Flights from St. Louis to Detroit
- Flights from St. Louis to Los Angeles
- Flights from St. Louis to Raleigh
- Flights from St. Louis to Seattle
- Flights from St. Louis to Atlanta
- Flights from St. Louis to Guayaquil
- Flights from St. Louis to Edmonton
- Flights from St. Louis to Vilnius
Flights to Ottawa
- Flights from Halifax to Ottawa
- Flights from Toronto to Ottawa
- Flights from Moncton to Ottawa
- Flights from Paris to Ottawa
- Flights from London to Ottawa
- Flights from Amsterdam to Ottawa
- Flights from Athens to Ottawa
- Flights from Calgary to Ottawa
- Flights from Glasgow to Ottawa
- Flights from Madrid to Ottawa
- Flights from Frankfurt to Ottawa
- Flights from Sydney to Ottawa
- Flights from Milan to Ottawa
- Flights from Manchester to Ottawa
- Flights from Rome to Ottawa
- Flights from Palma, Majorca to Ottawa
- Flights from Oslo to Ottawa
- Flights from Atlanta to Ottawa
- Flights from Dublin to Ottawa
- Flights from Brussels to Ottawa
Popular routes
- Flights from London to Alicante
- Flights from Islamabad to Chiang Mai
- Flights from Chișinău to Fairbanks
- Flights from Sioux Falls to Bristol
- Flights from Spokane to Ushuaia
- Flights from Springfield to Roosevelt Roads Naval Station
- Flights from Stockton to Gdańsk
- Flights from Syracuse to Calabar
- Flights from Tulsa to Strasbourg
- Flights from Destin to Xiamen
- Flights from Rome to Macapá
- Flights from London to Tirana
- Flights from Pisa to Navegantes