$59 Find Cheap Flights from Chicago to Port St. Lucie

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Chicago to Port St. Lucie departing on 8/13. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights from Chicago to Port St. Lucie

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$103
Typical prices: $286-$139
Frontier
Fri 8/28Sun 9/6
ORD - FLL • Non-stop
Cheapest one-way
$59
Typical prices: $93-$207
Frontier
Thu 8/13
ORD - FLL • Non-stop
Arrival airport
You can't fly directly to Port St. Lucie. It is served by Fort Lauderdale (FLL), located 83.9 miles from Port St. Lucie.
FAQs
FAQs
FAQs
FAQs
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Port St. Lucie!
Flight Deals
Useful Info
Flight Deals

Cheap Flights from Chicago to Port St. Lucie (CHI-FLL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Chicago to Port St. Lucie that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Chicago to Port St. Lucie

Fri, Aug 28 - Sun, Sep 6
Frontier Logo
7:55 am - 12:12 pm
ORD
-
FLL
3h 17mnonstop
Frontier Logo
9:53 am - 12:25 pm
FLL
-
ORD
3h 32mnonstop
$103Frontier
Mon, Jul 27 - Fri, Jul 31
Frontier Logo
8:05 am - 12:22 pm
ORD
-
FLL
3h 17mnonstop
Frontier Logo
9:43 am - 12:15 pm
FLL
-
ORD
3h 32mnonstop
$107Frontier
Fri, Aug 21 - Thu, Aug 27
Frontier Logo
7:55 am - 12:12 pm
ORD
-
FLL
3h 17mnonstop
Frontier Logo
9:53 am - 12:25 pm
FLL
-
ORD
3h 32mnonstop
$108Frontier
Wed, Sep 2 - Tue, Sep 8
Frontier Logo
7:55 am - 12:12 pm
ORD
-
FLL
3h 17mnonstop
Frontier Logo
9:53 am - 12:25 pm
FLL
-
ORD
3h 32mnonstop
$109Frontier
Fri, Jul 17 - Mon, Jul 20
Frontier Logo
8:05 am - 12:22 pm
ORD
-
FLL
3h 17mnonstop
Frontier Logo
9:43 am - 12:15 pm
FLL
-
ORD
3h 32mnonstop
$111Frontier
Sat, Aug 8 - Sat, Aug 15
Frontier Logo
8:05 am - 12:28 pm
ORD
-
FLL
3h 23mnonstop
Frontier Logo
9:43 am - 12:15 pm
FLL
-
ORD
3h 32mnonstop
$112Frontier
Tue, Aug 25 - Tue, Sep 1
Southwest Logo
8:35 am - 12:40 pm
MDW
-
FLL
3h 05mnonstop
Southwest Logo
7:20 am - 9:20 am
FLL
-
MDW
3h 00mnonstop
$163Southwest
Tue, Aug 11 - Tue, Aug 18
Southwest Logo
11:10 am - 7:35 pm
MDW
-
FLL
7h 25m
1 stop
Southwest Logo
4:55 pm - 7:00 pm
FLL
-
MDW
3h 05mnonstop
$173Southwest
Tue, Aug 11 - Tue, Aug 18
Southwest Logo
10:30 am - 7:35 pm
MDW
-
FLL
8h 05m
2 stops
Southwest Logo
7:20 am - 9:20 am
FLL
-
MDW
3h 00mnonstop
$178Southwest
Thu, Jul 16 - Sun, Jul 19
Allegiant Air Logo
2:48 pm - 11:13 pm
MDW
-
FLL
7h 25m
1 stop
Allegiant Air Logo
8:34 pm - 2:38 pm
FLL
-
MDW
19h 04m
1 stop
$194Allegiant Air
Useful Info

Good to know

Low seasonSeptember
Cheapest flight$59
Best time to beat the crowds with an average 30% drop in price.
Most popular time to fly with an average 22% increase in price.
Flight from Chicago O'Hare Airport to Fort Lauderdale

When to book flights from Chicago to Port St. Lucie

Are your dates flexible? Find out the best times to travel from Chicago to Port St. Lucie based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

FAQs for booking flights from Chicago to Port St. Lucie

  • Which airports will I be using when flying from Chicago to Port St. Lucie?

    When flying out of Chicago you’ll be using one of these airports: Chicago Midway, Chicago O'Hare Intl or Chicago Greater Rockford. Port St. Lucie does not have its own airport so you’ll be flying into nearby Fort Lauderdale airport, which is 83.9 mi away.

  • How long does a flight from Chicago to Port St. Lucie take?

    Direct flights cover the 1,171 miles separating Chicago and Port St. Lucie in about 2h 55m.

  • How many flights are there between Chicago and Port St. Lucie?

    23 direct flights run between Chicago and Port St. Lucie on a daily basis. On average, there are about 161 departures each week.

  • What’s the cheapest day of the week to fly between Chicago and Port St. Lucie?

    Consider leaving on a Tuesday and avoid Mondays if you are looking for the best rates. For your return to Chicago, you’ll find the best rates on Tuesdays and the most expensive ones on Mondays.

  • How does KAYAK find such low prices on flights from Chicago to Port St. Lucie?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Chicago to Port St. Lucie.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Chicago to Port St. Lucie?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Port St. Lucie from Chicago is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Chicago to Port St. Lucie?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Port St. Lucie with an airline and back to Chicago with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Chicago to Port St. Lucie?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Port St. Lucie from Chicago up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines provide the cheapest flights from Chicago to Port St. Lucie?

    In the last 5 days, the cheapest one-way ticket between Chicago and Port St. Lucie found on KAYAK was with Frontier for $29. Frontier offered a round-trip connection from $56 and Allegiant Air from $84.

Top tips for finding cheap flights from Chicago to Port St. Lucie

  • There is no airport in Port St. Lucie. Instead, you’ll be flying into Fort Lauderdale-Hollywood Airport when flying between Chicago and Port St. Lucie.
  • The cheapest flight from Chicago to Port St. Lucie was found 36 days before departure, on average.
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be May, June and July. The cheapest month to fly is September.

Reviews of the top 5 airlines serving Chicago to Port St. Lucie

 
Need help choosing which airline to fly with from Chicago to Port St. Lucie? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
SouthwestOverall score based on 4237 reviews
8.0Comfort
7.0Food
7.5Entertainment
8.6Crew
8.1Boarding
Airline reviews

OKay. I sat in the back of the plane and it was really loud between babies and little kids, and adults who.like to talk a lot and loudly most of the flight.

6.0 GoodAnonymous, Jun 2026
MDW - BDL
Read more Southwest reviews

OKay. I sat in the back of the plane and it was really loud between babies and little kids, and adults who.like to talk a lot and loudly most of the flight.

The first time I flew in the extra legroom section. It was difficult to notice a difference. I had bad luck with my neighbors. The crew was okay. Southwest has reduced the live TV options.

The flight was okay. The pilots did an amazing job and kept us updated on the flight. The flight attendants were okay. They found time to be chatty with each other rather than focus on the guests. One of the attendants was a little less warm when asking about my bag I had on my lap that I was using during latter part of the mid- flight. Mind you, it was not the departure descent. I’m respectful to each and every attendant, it was the tone in her voice reminding me to place my carryon bag on the floor. I hope to have a better experience next time.

Terrible. Even though there’s assigned seating now, they are still the slowest boarding airline of anyone.

I flew twice this week on Southwest, was delayed over 2 hours both ways. From Pittsburgh to Chicago it was due to weather but the gate agents, pilot etc were great at updating everyone. Today from Midway to Pittsburgh the plane had come from an international location, kept getting delayed, no information was given until we were delayed for the third time. It was ridiculous, whoever scheduled that plane to fly to Pittsburgh after didn’t consider a lot of things.

It was canceled. Supposedly weather. But there was no snow in Baltimore. At least we found out before driving to airport

The staff was very friendly, professional, and courteous. The overall flight was a great experience.

Okay, not wonderful. Short flight. Wi-fi didn't work properly. Stuck waiting for a gate to open upon arrival for 20 or so minutes.

They sent a notice that they were boarding an hour early. We had to leave the club and run to the gate. They said sorry, that came from corporate and was a mistake. They did not have enough seating because the flight before it had not taken off on time. They moved our gate and delayed it for an hour.

Plane crashed into a bus or some other vehicle on the ground while pulling out of the gate. No injuries, but wing tip was damaged and returned to gate for “maintenance issues” and we departed 5 hours later because the plane went out of service and new plane was flown in from a nearby airport, Midway.

Boarded early; and arrived home 40 mins early. After a long flight, it’s nice to be back home early. These flights have no amenities; no snacks. So need to bring your own

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

The crew was great. Very friendly and responsive. The plane was old, small and tight. We ran out of overhead space and I had to check. Middle seat was particularly tight.

Several missed and almost missed connections. It felt like everything was being patched together last minute without enough resources and it ended up being an extremely stressful experience that basically ruined our weekend on the west coast. What a waste.

Crew was friendly. Seats are too narrow, particularly when a big person is in the adjacent seat, but I understand this is due to smaller planes usually flight into Lincoln. I have experienced several flight delays going out and coming into Lincoln airport, I say maybe 50% or higher of the flights I've taken out of this airport have been delayed.

Great flight. Boarded efficiently. Arrived early at CLT. There was no in flight entertainment on this aircraft. Great crew.

The seat was comfortable. There was a lot of turbulence. If it weren't for that,it would have been okay.

Poor communication, flight was delayed for preventable reasons. I missed my connection.

No meal service to the back of the plane as it started late or was too slow to get it out before it was time to land.

American Airlines II: Delay Boogaloo. Multiple gate changes, delays, boarded and then MORE delays. I hate to say this won’t matter, but posting stuff about major corporations in 2026 is a post-modern “scream into the void.” Was multiple hours late coming home, so there you go.

The airplane was an old model, the overhead didn’t have enough room for people’s items and made boarding and boarding disappointing and stressful. Crew allowed passengers to bring more than the permitted baggage sizes.

Original flight was on time, then late, then changed gates...4 times. Once our newest plane came in, it was fine.

I almost missed my flight and they helped me out enormously

Delays experienced in boarding/take off due to incoming plane delayed. However, the boarding time/depart time in the app was significantly delayed in providing these updates. Usually not updated until an hour after we should have already boarded. Poorly managed.

Moved to earlier flight which unexpectedly had maintenance issues initially indicated as quick fix to ultimately plane changes. Moved back to original flight, also delayed. In all cases customer updates and communication very unclear, no updates on drivers for delays.

Typical AA - late by 90+ mn. Gate changed twice... Changed the departure time 6 times No explanation, no communication on reasons for delay I travel with AA twice a year... and it is consistently very poor.. I will continue to use AA only when i have to.

The gate got changed several times and the flight was delayed over an hour. Awful experience

American continues to decline in their customer service and its beyond disappointing.

It was an older plane. First Class was not especially roomy or comfortable. It was a short flight so there were no meal but they did offer mixed nuts which used to be normal but now is rare. Crew member was very polite and professional.

The gate attendant in Boston had a high raspy voice and spoke much too fast to be understood. Not pleasant.

The flight was delayed for more than 3 hours the flight attendant was so angry, it was my first flight with JetBlue but i don’t think I flight with them again.

On time, friendly attendants, quick wheelchair assistance and help checking in bags. Also appreciated change in seats, more forward to make it easier for my 97 year old mother to board and exit the plane. Thank you, JetBlue!

Flight did not have onboard charging and TV screen flickering.

JetBlue was good. Kayak offered us a deal if we bundled the rental car. This was a complete scam. Kayak said the total was $222... but when we went to pick up the car the agent at Rent a wreck said that we had to pay "fees and taxes" for a grand total of $750. I would recommend not using kayak or rent a wreck. They are both complicit in this scam. JetBlue worked out well.

What a great flight. Seats were more comfortable than other airlines. Flight was full but very easy to navigate. No stress no drama

TV was broken and could not shut it off. The flicking was bother me and gave me a headache. The WiFi wouldn’t work correctly, I was able to text but not search the web or surf social media. The plane itself had a lot of wear and tear it is due for an update.

Flight was on time and smooth. Customer service was decent

Excellent price. Everything on time. two bad parts. Kayak said I couldn't sign in for the flight online, but I got an email at the same time from Jet Blue and they let me sign in online. Second bad part was that, although I had provided my known traveler number, neither of my boarding passes, for this flight and the previous one, had TSA pre-check showing.

Boarding was done extremely poorly, with huge crowds gate loiterers blocking people from boarding, multiple lines of people trying to merge into one line. One of the male flight attendants who was doing drink service was not happy about having to let a passenger back to their seat and was unnecessarily sassy about it. I thought he was pretty entitled and not a great ambassador for JetBlue

There weren't enough employees at check in took awhile to get bags checked. There wasn't a wheel chair for me, I was sent to someone who turns out to work for a different airline, if My flight hadn't been delayed I probably would have missed my flight as it was, by the time I arrived at my gate, they started boarding in about 15 minutes. I don't know who took me to my gate, definitely was not the normal people who take passengers to the gate. I'm guessing she may have been in a management position. I wish I knew her name, she went beyond to help me. With that said everyone was kind, and were doing the best they could. So, I choose to say it was an Adventure, stressful start, but good. In the end went well. The situation was not only difficult for passengers but the employee's.

The staff at the check in counter was so rude. Made you feel Incompetent

Frontier scheduled a 40 minute connection in DEN. What they failed to mention was that they “close the doors” 20 mins prior to departure, which means you only have 20 mins. Not enough time. Possibly against DOT regulations. Filing complaint.

Flight was scheduled at 9:40pm. Got delayed to 10 am, the next day. crazy

The bag check, flight check-in, and onboard experience convinced my wife and me that we will actively go out of our way to avoid flying Frontier Airlines in the future. At bag check, we were informed that check-in could only be completed via the Frontier mobile app. Unfortunately, the app was extremely frustrating—sending us through repetitive, confusing loops that repeatedly forced us to decline add-on services with nearly every click. While most airline apps upsell, this one felt intentionally exhausting. As the process dragged on, we became genuinely concerned that my phone battery would die before check-in could be completed. We approached the bag check staff—who were standing together talking—and explained both our frustration and our predicament. They laughed. Later, my wife described the interaction as “gaslighting,” which felt accurate. We were then informed it would cost $25 per person simply to have our boarding passes printed. From that point forward, the tone of the experience was consistently hostile. The bag check employees were condescending and combative, behaving more like bullies than customer service staff. Unfortunately, that same attitude continued onboard. One flight attendant argued with me when I attempted to stow my backpack in the overhead bin. I explained that we had each paid $75 to check our bags specifically so we would not need to use carry-on space and could have adequate legroom. She demanded to see my ticket, pointed out that it said “no carry-on”—which I acknowledged—and I reiterated that this was precisely why we paid to check our bags. Her response was, “I don’t make the rules.” She then walked away, but not before asking if I “truly wanted to fly back to Chicago today?”—an unnecessary and unmistakable threat. It is also worth noting that despite booking our tickets together in the same transaction, we were not seated together. Upon our return to Chicago—where we could once again sit together—we compared onboard experiences. We both remarked on how unhappy the flight attendants appeared and how each of us was separately asked whether we would like to purchase a beverage. We declined. At no point was water mentioned as an option, leaving us with the clear impression that even water came at a cost—or that complimentary water, if available at all, was deliberately left unmentioned. Overall, the experience was shocking and deeply disappointing, but it was also a profound learning experience—one we will not forget and will not repeat. -Steve

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

My flight was originally from SAT to MCO connecting from MCO to ORD. We got diverted to ATL and than Frontier staff there was sooo un helpful first they said they couldn’t give us any accommodation since our flight first got delayed that cancelled and now it’s 221am and I am still in ATL since they said they need to create a new flight my final destination is ORD and I have been delayed twice and cancelled. With no real help the frontier app didn’t work no email updates over all such a horrible experience

Flight was canceled. Most upsetting was message from Kayak, stating that the flight was canceled and click with Kayak for details regarding rebook, refund details. THERE'S NO INFORMATION PROVIDED BY KAYAK EXCEPT THAT FLIGHT IS CANCELED. AND NOW THIS SURVEY TO FIND OUT HOW WAS THE FLIGHT !!!!!!!

I am writing to express my disappointment with my recent Frontier Airlines flight. I was charged $99 at the gate because my bag was said to be too large, yet once onboard there was no available overhead bin space, and I was required to place the bag under the seat in front of me anyway. This made the charge feel unnecessary and unfair. Additionally, before the flight even took off, I was asked to move from the seat I paid for into a middle seat so another passenger and her cat could have my seat to themselves. I was not offered compensation or an explanation for being moved from a paid seat. Between the unexpected bag fee and being forced to give up my seat, this experience fell well below acceptable customer service standards. I would appreciate a review of this situation and appropriate compensation.

Everything you need to know for your flight from Chicago to Port St. Lucie

Complete your trip to Port St. Lucie with a hotel stay or car rental