A park with autumn trees displaying red and yellow leaves.

Cheap Flights to Frontenac: Frontenac Flight Deals

View €51 flight on Sat, 12 Sept 2026Opens in a new window

Popular airlines to Frontenac

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 15% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap round-trip flights to Frontenac

Prices were available within the past 7 days and start at €51 for one-way flights and €101 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Delta
United
Icelandair
Iberia

Find the cheapest month to fly from Columbus (CMH) to St. Louis (STL)

From €130 - €338 per traveller.

Frequently asked questions

What is the name of Frontenac's airport?
Book a flight to Frontenac and you'll be hitting the runway at Lambert-St. Louis Intl. Airport (STL).
How far is Lambert-St. Louis Intl. Airport (STL) from central Frontenac?
STL is 13 kilometres from central Frontenac, so be prepared for a reasonable commute into the city centre.
What airport is best to fly into Frontenac?
With just one main airport in Frontenac, it won't take very long to find the best flight. You'll be jetting off to Lambert Field, which is located around 13 kilometres from the centre of town.
How many airlines fly to Frontenac?
There are 12 air carriers connecting Frontenac with 61 airports globally.
Which airlines fly to Frontenac?
United Airlines and American Airlines operate the largest proportion of flights to Frontenac. One of the most preferred ways to get there is on a United Airlines flight from Chicago.
How many nonstop flights are there to Frontenac?
Organising an amazing Frontenac getaway is a piece of cake when there are 1,206 direct flights each week to choose from.
Where are the most popular flights to Frontenac departing from?
Flights to Frontenac departing from Chicago, Dallas and New York airports are the most in demand.
How long is the flight to Frontenac Airport?
If you're flying to Frontenac from Chicago, you'll have a flight time of 1 hour and 22 minutes. Those departing from Dallas should expect to be airborne for around 1 hour and 43 minutes. From New York it's 3 hours and 1 minute away.
How to book the cheapest flight to Frontenac?
If you'd like to have some extra spending money on your trip to Frontenac, then listen up! As every experienced traveller will tell you, avoid booking at the last minute. Airfares are often highest close to the departure date. Don't stop there, however. Do some research and check if there is more than one airport at your destination. Ticket prices often differ depending on which airport you pick. Remember to compare fares across airlines too. And finally, don't forget that it's first in, best dressed. Familiarise yourself with airfare costs and have your credit card ready to reserve your seat as soon as you see a great bargain. The best deals don't last long.
Do you have any tips for my flight to Frontenac?
Depending on where you're coming from, your flight to Frontenac could be completely painless or it could go on forever. We've pulled together some useful tips that will help you start your next great adventure on a positive note. What to pack in your hand luggage:
  • Travelling on a plane can be a great experience if you pack the right gear. Firstly, you'll need basic toiletry items, such as deodorant and a toothbrush, a fresh set of clothes and something to read. Secondly, make room in your carry-on bag for your phone and charger, any daily medications and perhaps a quality neck pillow too. Lastly, remember to take your passport, travel papers and your credit cards.
Do not pack the following items in your hand luggage:
  • While the list of restricted items can differ between air carriers, the general rule to follow is nothing sharp, flammable or explosive. This includes screwdrivers, blades, aerosol cans and flares. Sporting equipment like ice skates, and items that could injure passengers, such as swords and batons, can't come on board with you either.
What to wear on a flight:
  • Your goal here is to feel as comfortable as you can. Choose flat, closed-toe shoes, dress in loose, breathable clothing and don't forget to bring a sweater in case it gets cold in the cabin.
  • Deep vein thrombosis (DVT) can pose a risk on long-distance flights. It's the result of blood clots forming due to inactivity and poor circulation, so do some gentle foot and leg exercises in your seat and consider wearing compression socks or tights.
How to get through airport security fast when flying to Frontenac?
As savvy travellers know, the secret is to be well organised before you arrive at the security gate. That way, you'll be boarding that plane to Frontenac in next to no time. Follow these helpful tips and get your holiday off to a fantastic start:
  • First things first. Your ID and travel documents will need to be presented to security personnel. Keep them handy to avoid fumbling around for them.
  • Time to strip down. Well sort of. Your belt, coat, keys and other contents of your pockets, like your headphones, will need to go on a tray through the X-ray machine. Make your life easier by removing them as your turn draws near.
  • All your electronic devices, including your laptop and phone, are also required to be separately scanned.
  • Any liquids or gels, such as perfume or toothpaste, that you want to take on board must be no larger than 3.4 ounces (100 millilitres). They must also all fit inside a quart-size (one litre), clear zip-close bag.
  • Lightweight sneakers are a good footwear choice as you're less likely to have to remove them when going through security. Boots and other heavy shoes are usually subjected to additional screening.
  • Sharp or pointed items are prohibited in the cabin. They'll be seized at security, so pack them in your checked baggage.

Book with confidence

Expedia.ie is an online travel company that specialises in securing the best prices for flights to Frontenac. With Expedia you get highly specialised services, combining the best of technology, in-depth knowledge and the best connections in order to offer great deals to Frontenac. Expedia shares your passion for travel and has built the best online travel service that promotes and encourages travel. Whether you are looking for cheap flights to Frontenac, or are just on the lookout for the best flights to Frontenac, you are sure to find the best deals with Expedia.ie.

"One of the many benefits of booking your flights through Expedia is that we are one of the world’s largest online travel agency, which means we use our collective experience and work tirelessly to bring you the best prices. With Expedia you get a user-friendly internet experience and a dedicated customer support service that ensures that everything goes smoothly. The goal of Expedia is to offer premium services at the lowest price, all at one single place. If you wish to save even more try combing a hotel in Frontenac to your flight and create a personalised low cost city break or holiday to your favourite destination. Book early and you could save even more!

If you have an Expedia.ie itinerary number and have a question or concern about your travel plans you can call us on (01) 524 5005 from 8am - 10pm Monday to Friday, and 9am - 10pm at weekends and an Expedia agent will help you.

Travel information

Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Destination city name
St. Louis
Roundtrip price
€101

Trending flights to Frontenac

Prices were available within the past 7 days and start at €51 for one-way flights and €101 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
*Available to Expedia members.