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Cheap flights from Chicago to St. Louis
Round-trip
Economy
Flight information for Chicago to St. Louis
(CHI to STL)
Find info about flight duration, direct flights, and airports for your flight from Chicago to St. Louis
| Best Price Found | $137 | The best flight deal from Chicago to St. Louis found on momondo in the last 72 hours is $137 |
| Fastest flight time | 1h 17m | The fastest flight from Chicago to St. Louis takes 1h 17m. |
| Direct flights | Mo, Tu and Fr | Direct flights go from Chicago to St. Louis on Monday, Tuesday and Friday. Airlines offering direct flights are: ANA and Aer Lingus.. |
| Airports in St. Louis | 1 airport | There is 1 airport near St. Louis: Lambert-St Louis (STL) |
How to get the cheapest flight ticket from Chicago to St. Louis
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly from Chicago to St. Louis?
July
The cheapest time of year to fly to St. Louis from Chicago is July. Most expensive is March
What is the cheapest day to depart Chicago for St. Louis?
Saturday
The cheapest day of the week is typically Saturday. The most expensive is typically Monday
When is the cheapest time to fly from Chicago to St. Louis?
at noon
Chicago to St. Louis flights are approximately 15% more expensive in the afternoon than at noon
What is the cheapest airline that flies to St. Louis from Chicago?
Cape Air
Cape Air, Air Choice One, and Major Airline are the most popular carriers operating from Chicago to St. Louis
What is the cheapest Chicago to St. Louis flight route?
Chicago O'Hare Intl - Lambert-St Louis
Fly from Chicago O'Hare Intl to Lambert-St Louis for the best Chicago - St. Louis flight prices
How far in advance should you book Chicago to St. Louis flights?
51 days before
The cheapest time to buy a flight from Chicago to St. Louis is approximately 51 days to departure
60
Days before departure
0
Easily compare round-trip flights from Chicago to St. Louis
Below you can see the best fares for your round-trip flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Chicago to St. Louis by changing tabs
Cheapest
Best
Quickest
Frontier
Jan 14
ORD
Chicago O'Hare Intl
10h 27m
1 stop
STL
Lambert-St Louis
Jan 24
STL
Lambert-St Louis
29h 27m
1 stop
ORD
Chicago O'Hare Intl
$100
Search deals
Multiple Airlines
Feb 6
ORD
Chicago O'Hare Intl
22h 50m
2 stops
STL
Lambert-St Louis
Feb 8
STL
Lambert-St Louis
9h 22m
1 stop
ORD
Chicago O'Hare Intl
$117
Search deals
American Airlines
Jan 7
ORD
Chicago O'Hare Intl
6h 46m
1 stop
STL
Lambert-St Louis
Jan 7
STL
Lambert-St Louis
4h 55m
1 stop
ORD
Chicago O'Hare Intl
$137
Search deals
Find the cheapest one-way flights from Chicago to St. Louis
If you're looking for one-way flights from Chicago to St. Louis, view some of our deals below provided by Frontier
Cheapest
Best
Quickest
Frontier
Jan 21
ORD
Chicago O'Hare Intl
10h 27m
1 stop
STL
Lambert-St Louis
$40
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Multiple Airlines
Jan 21
ORD
Chicago O'Hare Intl
24h 32m
2 stops
STL
Lambert-St Louis
$42
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American Airlines
Dec 24
ORD
Chicago O'Hare Intl
1h 27m
STL
Lambert-St Louis
$69
Search deals
Which airlines flying from Chicago to Lambert-St Louis have COVID-19 safety policies in place?
Airlines such as Delta have taken additional precautions to make sure you’re safer while traveling. Usage of HEPA filters, scheduled sanitation, enhanced cleaning of aircrafts, pre-flight testing, and mask policies are some of the implemented practices made by airlines to help keep you safe as you depart from Chicago to Lambert-St Louis. Keep in mind that policies will vary by airline.
Are airlines flying from Chicago to Lambert-St Louis offering flexible cancellation due to COVID-19?
Due to the global impact of COVID-19, some of our airline partners operating flights from Chicago to Lambert-St Louis, such as American Airlines, United Airlines, and Cape Air may have put in place flexible cancellation policies. Use our site to search for all of the airlines offering this flexibility to you.