Cheap Flights from Cincinnati to St. Louis from US$49

Frequently Asked Questions

• What are the cheapest flights from Cincinnati to St. Louis (CVG-STL)?

  Based on Trip.com data, Frontier Airlines offers one-way fares as low as US$49 on Cheapest nonstop routes (e.g. CVG to STL on Thu, Sep 3), while Frontier Airlines offers Cheapest nonstop round-trips from US$165 departing on Thu, Aug 27 and returning on Mon, Aug 31.

• Which airlines offer flights from Cincinnati to St. Louis?

  At the moment, several airlines serve connecting flights from Cincinnati to St. Louis, including: Delta Air Lines Selected airlines are based on historical data collected from flight bookings made by users on Trip.com within the last 90 days.

• When is the best time to book flights from Cincinnati to St. Louis?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Cincinnati to St. Louis is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How can I find the best deals on flights from Cincinnati to St. Louis?

  To find best deals on flights from Cincinnati to St. Louis, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Thu, Sep 3, with one-way flights priced at just US$49.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Frontier Airlines.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for St. Louis travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Cincinnati (CVG) to St. Louis (STL) the cheapest?

  The cheapest months to fly from Cincinnati to St. Louis is October, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Cincinnati to St. Louis on?

  After crunching the numbers on our August flight calendar, it's currently cheapest to fly from Cincinnati to St. Louis on August 27, 2026 with Frontier Airlines, with prices starting at US$165.

• Which airports can I fly to for St. Louis from Cincinnati?

  You can land at any one of the following hubs in St. Louis, with Cincinnati/Northern Kentucky International Airport to St. Louis Lambert International Airport (CVG-STL) is by far the most common option on this route: St. Louis Downtown Airport (CPS) St. Louis Lambert International Airport (STL).

• Is there any time difference between Cincinnati and St. Louis?

  The time difference between St. Louis and Cincinnati is 1h.

• How do I change or cancel my ticket from Cincinnati to St. Louis?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

• What is the average cost of a one-way flight from Cincinnati to St. Louis?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Cincinnati to St. Louis is US$174. Fares vary by travel date, airline and availability.

• How do I book flights from Cincinnati to St. Louis on Trip.com?

  Enter Cincinnati and St. Louis, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.