$328 Find Cheap Flights from Knoxville to Costa Rica

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Knoxville to Costa Rica departing on 4/30. 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

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Cheap Flights from Knoxville to Costa Rica

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
San José
San José2 stops$422
Liberia
Liberia1 stop$633
San José
San José2 stops$422
Liberia
Liberia1 stop$633

Book Cheap Knoxville to Costa Rica Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Knoxville to Costa Rica 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 Knoxville to Costa Rica

Fri, Apr 24 - Fri, May 8
Multiple Airlines Logo
5:39 pm - 11:33 am
TYS
-
SJO
43h 54m
2 stops
Multiple Airlines Logo
1:00 pm - 11:06 am
SJO
-
TYS
20h 06m
1 stop
$422Multiple Airlines
Sun, Apr 19 - Sun, Apr 26
Multiple Airlines Logo
9:32 pm - 11:33 am
TYS
-
SJO
16h 01m
1 stop
Multiple Airlines Logo
12:38 pm - 12:25 pm
SJO
-
TYS
21h 47m
1 stop
$444Multiple Airlines
Thu, May 28 - Sat, Jun 6
Multiple Airlines Logo
9:19 pm - 11:45 am
TYS
-
SJO
16h 26m
1 stop
Multiple Airlines Logo
9:35 am - 11:16 am
SJO
-
TYS
47h 41m
2 stops
$452Multiple Airlines
Sun, Jun 14 - Sun, Jun 21
Multiple Airlines Logo
9:19 pm - 11:45 am
TYS
-
SJO
16h 26m
1 stop
Multiple Airlines Logo
5:05 am - 4:53 pm
SJO
-
TYS
33h 48m
2 stops
$458Multiple Airlines
Mon, Jul 13 - Fri, Jul 24
Multiple Airlines Logo
12:53 pm - 8:30 am
TYS
-
SJO
21h 37m
2 stops
Multiple Airlines Logo
9:35 am - 11:33 pm
SJO
-
TYS
11h 58m
1 stop
$465Multiple Airlines
Mon, Oct 5 - Fri, Oct 9
American Airlines Logo
6:30 pm - 11:05 am
TYS
-
LIR
18h 35m
2 stops
American Airlines Logo
1:15 pm - 8:22 am
LIR
-
TYS
17h 07m
2 stops
$633American Airlines
Tue, Oct 6 - Fri, Oct 9
Delta Logo
5:30 am - 12:00 pm
TYS
-
LIR
8h 30m
1 stop
Delta Logo
1:25 pm - 11:46 pm
LIR
-
TYS
8h 21m
1 stop
$637Delta
Sat, Oct 3 - Fri, Oct 9
American Airlines Logo
1:40 pm - 1:45 pm
TYS
-
LIR
26h 05m
1 stop
American Airlines Logo
1:15 pm - 12:27 pm
LIR
-
TYS
21h 12m
2 stops
$644American Airlines
Tue, Jun 16 - Thu, Jun 25
American Airlines Logo
5:36 am - 1:41 pm
TYS
-
LIR
10h 05m
1 stop
American Airlines Logo
2:45 pm - 11:59 pm
LIR
-
TYS
7h 14m
1 stop
$646American Airlines
Tue, Jun 16 - Thu, Jun 25
American Airlines Logo
5:36 am - 1:41 pm
TYS
-
LIR
10h 05m
1 stop
American Airlines Logo
2:45 pm - 10:48 am
LIR
-
TYS
18h 03m
2 stops
$651American Airlines
Booking Insights

KAYAK's insights & trends for Knoxville to Costa Rica flights

Get data-powered insights and trends into flights from Knoxville to Costa Rica to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Knoxville to Costa Rica?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Knoxville to Costa Rica, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Knoxville to Costa Rica is November, when tickets cost $530 (return) on average. On the other hand, the most expensive months are December and July, when the average cost of round-trip tickets is $760 and $725 respectively.

Good to know

Low seasonSeptember
Cheapest flight$328
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly with an average 2% increase in price.
Flight from Knoxville to Liberia

FAQs - booking Costa Rica flights

  • How does KAYAK find such low prices on flights from Knoxville to Costa Rica?

    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 Knoxville to Costa Rica.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Knoxville to Costa Rica?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Knoxville to Costa Rica 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 Knoxville to Costa Rica?

    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 from Knoxville to Costa Rica with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Knoxville to Costa Rica?

    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 from Knoxville to Costa Rica up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Knoxville to Costa Rica

 
Need help choosing which airline to fly with from Knoxville to Costa Rica? 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
DeltaOverall score based on 8395 reviews
7.9Comfort
8.5Crew
8.1Boarding
7.8Entertainment
7.2Food
Airline reviews

Okay considering we had weather delays which the Pilot notified us of immediately!

8.0 ExcellentPaul A, Apr 2026
ORD - ATL
Read more Delta reviews

Okay considering we had weather delays which the Pilot notified us of immediately!

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

Flight from Fort Wayne to Atlanta was the smallest in terms of cabin space that I've ever seen. A carry on I've used for 20 years BARELY fit in overhead compartment. I'm 5'10" and felt very cramped. Not the best experience.

I am writing to express my dissatisfaction with the poor service and unprofessional staff we encountered when traveling with an infant. Our flight was delayed, and the gate staff failed to manage the boarding process appropriately. Due to incorrect, unavailable, or missing 'pink tag' stroller and car seat check-in procedures at the gate, we were forced to board last. Furthermore, the gate staff was rude and dismissive, causing significant distress to our infant. To make matters worse, one of our checked items—an infant sleeper/lounger—was returned to us broken. Given the unsafe handling of essential equipment and unprofessional treatment, I expect a prompt resolution regarding compensation for the damaged items.

We departed and landed early which was a nice surprise. The boarding process was slow.

N Everything was perfect from boarding to assistance to baggage in Tampa

Subpar. The seating on the plane is almost unbearable. We are literally touching and/or sitting on each other which is totally unacceptable and shameful. Pilots and crew was very accommodating and friendly.

The boarding was organized and informative but the plane was tight meaning that you were sitting on one another and extremely uncomfortable. It’s disappointing that can’t have common seating comfort on the plane.

Loved the crew! Sucks that we went from 1 hour and 8 minute layover to a 3 hour layover. But weather sucks like that.

I was told that they needed to check my bag at the gate and to pick it up at the gate in Richmond. No big deal. I know they can't control the weather, but we flew around RIC for 45 minutes to avoid the storm and were 25 minutes late leaving as well. Once we landed, we were told to go to baggage claim to pick up our luggage. I went to bathroom, paid for parking, and went to the assigned baggage claim location. United flight people came down with us as well. They got their luggage immediately. Next, South West people came down about 10 minutes later. They got their luggage next. We finally got our luggage around 30 minutes in waiting. Was not a wonderful experience. No reflection on Delta, but the ground crew was lousy at best.

All good flight was 35 minutes early when arriving in Edinburgh

Flights were on time actually early service was good and crew cheerful

Every staff member was professional, friendly and courteous. The pizza twist was ok. It was warm but too much dough.

The boarding timing needs to be improved. The flight was delayed again because it took way too long to board. I was already exhausted from sleeping at the airport and spending all day there due to delay from my previous flight that connected in Chicago.

I had a terrible experience. My flight got delayed from Atlanta to Chicago on Monday April 6, 2026, and that led to me missing my next flight to Brussels. United Airlines didn’t provide me with any accommodation for shelter. I had to sleep at the airport in Chicago. The next flight I was put on didn’t leave until the evening hours of Tuesday 4/7/2026.

Boarding was again a "free for all". We were boarding group 4, and almost the entire plane was able to board before us. It's a shame that someone who follows the rules, gets the short end of the stick. Not fair.

Flight left on time, arrived early, pleasant staff provided water, coffee, etc. access to bathrooms was reasonable and were well maintained. blankets were available, lots of entertainment options. LUGGAGE SERVICE WAS GREAT. I got my one checked bag quickly and was able to make a bus connection for a 2 hour bus ride saving me from waiting another 1.5 hours.

The boarding process was straightforward. One pertinent observation regarding all boarding procedures is that if an individual requires assistance or possesses a special status and is part of preboarding, it is advisable to limit the number of passengers who can preboard with them, rather than the entire, sometimes large, companion groups. The seats are uncomfortable, and the entertainment options are significantly inferior compared to other airlines. During the snack service, I requested an additional bag of snacks, but my request was denied. Initially, the flight attendant agreed to my request.becoming a strange accurate moment. The flight duration was four hours.

The flight was officially delayed 3 times, and was actually later than that. Combined, it was a 3 hour delay, but there was no recognition (miles, voucher, etc). The crew seemed stressed. The captain sounded nervous in his announcements. The flight itself was smooth and uneventful.

United didn’t even try to hold the flight for me. They knew I had a tight connection and when I arrived at the gate less than 10 mins after final boarding the flight had already gone. The gate agent wasn’t even notified that I was on my way. She was told I wasn’t at the airport

I'm not sure American is capable of on-time arrivals and departures. When you land at ORD, you almost always get held on the tarmac because your gate is still occupied. I may have missed my connection, but that ended up up being significantly delayed as well. Once again, I finally got home well after midnight.

Same plane as RDU to LGA — internet not working. Pilot issue of some sort at end of prior flight - I was on same plane for my connection. Late/delayed —

Good flight, seated and had a water within 5 minutes. Crew was hospitable.

Message about flight cancelation was received late due to being in the air. No explanation, just canceled and booked on morning flight. We had to stay in the airport overnight because there was no transportation offered to get to the hotel that AA had available. Actual inflight was fine.

I didn't go from Reno to Phoenix I ended up going from Reno to Dallas to Tucson because my flight rebooked because my Amtrak was late I tried notifying you guys I also don't know what you ask me about my flight because you guys didn't book my flight

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.

Bag drop was very disorganized in Miami. All main cabin passengers were shunted to just a few lanes and they had an equal number of lanes for first class passengers but there was nobody on those lines. They did nothing to bring the main cab and passengers over to the open lines and they just had employees standing there and doing nothing

there are no options s for snack besides cookies would ve nice to have a salty option n

We did not have enough time to make our connecting flight. As a result, we were put onto a different airline for our second leg. The different airline was NOT comparable to British Airlines, and our arrival was significantly delayed. The actual flight on BA was amazing.

We left at 1030 am pacific from LA and supposed to land at 7 pm Eastern in NY. They made a detour, stopped in Philadelphia and didn’t land till 1130 PM Eastern!!! Worst flight experience with no pilot communication with no explanation as to what was going on. Everyone was very frustrated to say the least.

Everything you need to know for your flight from Knoxville to Costa Rica

Information on your arrival and departure airports