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Cheap flights from Chicago O'Hare Intl Airport to St. Louis
ORD — STL
17 Oct — 24 Oct1
Cheapflights Tip: The best prices from Chicago O'Hare Intl to Lambert-St Louis are usually found in March or August, booked 80 days in advance, depart on a Monday or Friday and return on a Wednesday
Cheap flight deals from O'Hare Intl to St. Louis
Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to St. Louis (STL). 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 17 September 2025.
Popular in | September |
|---|---|
Cheapest in | March |
Average price | £246 |
Good round-trip deal | £125 or less |
Best time to book a flight from O'Hare Intl to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from O'Hare Intl with our price prediction graph.
Estimated return 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.
Cheapflights Insights
Everything you need to know about your flight from Chicago O'Hare Intl Airport to St. Louis
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How far ahead should I book a flight from Chicago O'Hare Intl Airport to St. Louis?
Use this chart to determine the optimal time to book a return flight from O'Hare Intl to St. Louis. Price data was last updated on 12 September 2025.
Booking 78 days in advance of your planned departure date is, on average, the best time to get cheap flights from Chicago O'Hare Intl Airport to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to St. Louis?
Currently, February is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to St. Louis (average of £722). Flying from Chicago O'Hare Intl Airport to St. Louis in December is currently the most expensive (average of £1,033). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from ORD to STL?
Find hourly flight availability from O'Hare Intl to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 September 2025.
Unlike in the morning, when flights are generally more expensive, you can save up to 22% on flights from Chicago O'Hare Intl Airport to St. Louis by exploring options for tickets at midday.
Reviews of airlines servicing St. Louis
Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated 17 September 2025.
Get a feel of what it's like to fly with American Airlines from Chicago O'Hare Intl Airport to St. Louis by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.2
Food
6.4
Crew
8.0
Boarding
7.5
Overall
7.2
Entertainment
6.9
Reviews
1 / 20
2.0
MediocreJeremy,Sept 2025
SAN - PHL
Comfort
7.2
Food
6.4
Crew
8.0
Boarding
7.5
Overall
7.2
Entertainment
6.9
Reviews
1 / 20
2.0
MediocreJeremy,Sept 2025
SAN - PHL
Related info for your journey
Find useful and relevant information for your journey from O'Hare Intl to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Complete your trip
Complete your trip to St. Louis by adding a car hire and/or hotel booking to your travel itinerary.
Top airline flying from O'Hare Intl to St. Louis
Discover the top airline that operate flights from O'Hare Intl to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 17 September 2025.
Fly with Cheapflights
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How does Cheapflights help users find flights from O'Hare Intl to St. Louis?
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Why should you use Cheapflights to find cheap flight tickets from O'Hare Intl to St. Louis?
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Can Cheapflights find flights from O'Hare Intl to St. Louis with no change fees?
Yes! Cheapflights helps users easily find flights from O'Hare Intl to St. Louis with no change fees.
Can Cheapflights notify me if prices for flights from O'Hare Intl to St. Louis become cheaper?
Not ready to book yet? You can track prices for flights from O'Hare Intl to St. Louis on Cheapflights with our Price Alert feature and get notified when better prices are available.