$362+ Cheap flights from St. Louis to Sault Ste. Marie (STL - CIU)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — CIU
Feb 25 — Mar 41
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Sault Ste. Marie
Cheapest flights from St. Louis to Sault Ste. MarieExplore the most affordable flight options available from St. Louis to Sault Ste. Marie. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 26, 2026.
Explore the most affordable flight options available from St. Louis to Sault Ste. Marie. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 26, 2026.
This Delta deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/142:18 pm
STL
- CIU
1 stop3h 54m
Delta
Tue 8/183:55 pm
CIU
- STL
1 stop5h 36m
Delta
Deal found 1/25![Delta logo]()
$362
This United Airlines deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/1811:45 am
STL
- CIU
1 stop26h 19m
United Airlines
Sun 6/213:40 pm
CIU
- STL
1 stop24h 41m
United Airlines
Deal found 1/24![United Airlines logo]()
$698
Find flight deals from St. Louis to Sault Ste. Marie
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Sault Ste. Marie (CIU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $698 (United Airlines) |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Sault Ste. Marie that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 26, 2026.
Use the filters below to find and compare flights from St. Louis to Sault Ste. Marie that are best for you.
Fly from
St. Louis
Fly to
Sault Ste. Marie
Route
Depart
Return
Price
St. LouisSault Ste. Marie
STL - CIU
STLCIU
Lambert-St Louis
Thu 6/18
11:45 am-3:04 pm
1 stop26h 19m
Sault Ste. Marie Chippewa County
Sun 6/21
3:40 pm-3:21 pm
1 stop24h 41m
$698
Compare providers for flights from St. Louis to Sault Ste. Marie
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Sault Ste. Marie in January.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Sault Ste. Marie flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Sault Ste. Marie flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Sault Ste. Marie flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Sault Ste. Marie flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Sault Ste. Marie flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Louis to Sault Ste. Marie
Have a flexible travel schedule? Discover the best time to fly to Sault Ste. Marie from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.