Cheap flights from Illinois to St. Louis from $68
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to St. Louis departing on 2/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Deals available from 900+ travel sites.
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Illinois to St. Louis
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Cheap bus & train deals from Illinois to St. Louis
All round-trip flight deals to St. Louis
Southern / Mokulele flights from Illinois to St. Louis
Our best Southern / Mokulele deals on Illinois to St. Louis flight tickets
Frontier flights from Illinois to St. Louis
Our best Frontier deals on Illinois to St. Louis flight tickets
See travel insights to St. Louis from
How to get the cheapest flight ticket from Illinois 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 to St. Louis?
In general, May is the cheapest month to fly from Illinois to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $236. The month of March is another great option to travel to St. Louis, with average flight prices from Illinois averaging around $238.
What is the cheapest day to depart on your flight to St. Louis?
The cheapest day to depart on your flight to St. Louis is on a Saturday when prices can be found for as low as $236. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $331. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.
What is the cheapest time of day to depart on your flight to St. Louis?
Flying to St. Louis from Illinois in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $242 when looking at flights departing in the afternoon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $287 per ticket.
What is the cheapest Illinois to Lambert-St Louis flight route?
Fly from Chicago O'Hare Intl to Lambert-St Louis for the best Illinois - Lambert-St Louis flight prices
How far in advance should I book a flight to St. Louis?
The best time to book a flight to St. Louis from Illinois is 43 days out, which is when prices tend to be around $271. In the past 72 hours, momondo users found flights from Illinois to St. Louis for as low as $117.
What cabin class options are available on Illinois to Lambert-St Louis flights?
There are 4 cabin classes available to choose from on Illinois to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
Cheap Illinois to St. Louis flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Illinois to St. Louis
When did momondo last update prices for flights from Illinois to Lambert-St Louis Airport?
Prices for flights from Illinois to Lambert-St Louis Airport refresh daily.
How many operators does momondo search for flights from Illinois to Lambert-St Louis Airport?
There are 4 operators available for flights from Illinois to Lambert-St Louis Airport as of November 2024.
How old do you have to be to fly from Illinois to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Illinois to St. Louis?
momondo data reveals that the most frequently booked plane model on the route from Illinois to St. Louis is Boeing 737-800, representing 15.17% of all bookings. The subsequent popular models are Embraer 175 at 9.54%, Canadair (Bombardier) Regional Jet CRJ-550 at 8.98%, and Airbus A320-100/200 at 8.77%.
Best airlines flying from Illinois to St. Louis
Compare and see reviews for airlines that fly from Illinois to St. Louis with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $115 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $129 | Free Cancellation | Rating 7.4 9,156 reviews | |||
| PriceFrom $143 | Free Cancellation | Rating 6.8 29 reviews | |||
| PriceFrom $181 | Free Cancellation | Rating 8.1 4,984 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Illinois to St. Louis?
It is quick and easy to find Illinois to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.
Can I find flights from Illinois to St. Louis with flexible booking policies on momondo?
All flight searches from Illinois to St. Louis on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Illinois to St. Louis?
Once all potential Illinois to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Illinois to St. Louis right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to St. Louis from Illinois. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.