$251 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 6/22. 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 José1 stop$540
Liberia
Liberia1 stop$656
San José
San José1 stop$540
Liberia
Liberia1 stop$656

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

tis, jun 9 - mån, okt 26
Multiple Airlines Logo
4:45 pm - 3:11 pm
TYS
-
SJO
24h 26m
1 stop
Multiple Airlines Logo
7:07 am - 9:44 pm
SJO
-
TYS
12h 37m
1 stop
$540Multiple Airlines
ons, sep 16 - sön, sep 20
Southwest Logo
8:00 am - 6:40 pm
TYS
-
SJO
12h 40m
2 stops
Southwest Logo
9:00 am - 9:45 pm
SJO
-
TYS
10h 45m
2 stops
$556Southwest
mån, jun 8 - mån, okt 26
Multiple Airlines Logo
7:27 pm - 3:11 pm
TYS
-
SJO
21h 44m
1 stop
Multiple Airlines Logo
7:07 am - 9:44 pm
SJO
-
TYS
12h 37m
1 stop
$559Multiple Airlines
tis, jun 9 - tis, okt 27
Multiple Airlines Logo
4:45 pm - 3:11 pm
TYS
-
SJO
24h 26m
1 stop
Multiple Airlines Logo
7:48 pm - 1:58 pm
SJO
-
TYS
16h 10m
2 stops
$567Multiple Airlines
fre, jul 3 - fre, jul 10
Multiple Airlines Logo
7:20 pm - 8:20 am
TYS
-
SJO
15h 00m
1 stop
Multiple Airlines Logo
7:07 am - 11:33 pm
SJO
-
TYS
14h 26m
1 stop
$568Multiple Airlines
tis, jun 9 - fre, okt 30
Multiple Airlines Logo
4:45 pm - 3:11 pm
TYS
-
SJO
24h 26m
1 stop
Multiple Airlines Logo
7:07 am - 9:41 pm
SJO
-
TYS
12h 34m
1 stop
$572Multiple Airlines
ons, jul 1 - ons, jul 8
Delta Logo
7:35 am - 12:00 pm
TYS
-
LIR
6h 25m
1 stop
Delta Logo
1:25 pm - 11:52 pm
LIR
-
TYS
8h 27m
1 stop
$656Delta
mån, jun 8 - ons, okt 28
American Airlines Logo
6:00 am - 11:22 am
TYS
-
LIR
7h 22m
1 stop
American Airlines Logo
1:15 pm - 11:35 pm
LIR
-
TYS
8h 20m
1 stop
$693American Airlines
mån, jun 8 - ons, okt 28
American Airlines Logo
6:00 am - 11:22 am
TYS
-
LIR
7h 22m
1 stop
American Airlines Logo
1:15 pm - 8:22 am
LIR
-
TYS
17h 07m
2 stops
$698American Airlines
ons, jul 1 - ons, jul 8
Delta Logo
5:40 am - 12:00 pm
TYS
-
LIR
8h 20m
1 stop
Delta Logo
1:25 pm - 11:52 pm
LIR
-
TYS
8h 27m
1 stop
$716Delta
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 December, when tickets cost $324 (return) on average. On the other hand, the most expensive months are April and February, when the average cost of round-trip tickets is $574 and $536 respectively.

Good to know

Low seasonSeptember
Cheapest flight$251
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from Knoxville to San José

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 8456 reviews
7.2Food
7.8Comfort
8.1Boarding
7.8Entertainment
8.5Crew
Airline reviews

Enjoyed it very much. Especially liked the free WiFi that Delta offers.

10.0 ExcellentBenjamin, May 2026
CLT - MSP
Read more Delta reviews

Enjoyed it very much. Especially liked the free WiFi that Delta offers.

Smooth flight. Left on time, and got in 15 minutes early. Onboard video was great

For some reason, TSA Atlanta didn’t have my bag on the flight on time and they don’t have to provide Delta a reason for that.

WiFi didn’t work on two of four planes. Flight attendants were not overly friendly or welcoming. Planes were extremely slow to board and deplane.

Delta does a great job with entertainment and free wifi. I can still be in touch with my colleagues while in the air.

Aside from a completely packed plane, I really have no complaints.

Bus to plane was delayed for no apparent reason and our luggage was still on the belt when they shut it off. Took about 20 minutes to turn it back on to get our luggage.

It was a pleasant surprise to have complimentary Wi-Fi on the flight

Much better than Latam, the worse airline company ever. I hope I don't have the need to fly Latam ever in my life again.

Seats in Delta Main are unbelievably close to the seat in front of. Hard to get a backpack under the seat.

Excellent service in Polaris class IAD to ZRH. Arrived rested and well fed after the overnight flight.

My flight time was changed without any notification to me which ruined my time sensitive plans so I ended up completely changing my travel plans and no reimbursement.

Excellent! I got to Munich and was transferred to my Lufthansa flight quickly, in 15 to 20 minutes, so I did not miss my flight. However, I had checked my overhead bag at the boarding gate in Tampa. That got to Tunis the next day. That is to be expected.

It's a short hop. My carryon was checked at the gate, I didn't have to drag it all over the airport. Excellent wheelchair assist.

WiFi didn’t exist , seats were super cramped, lights stayed on near my seat for a long time while others were dimmed, the food/trash/drink cart hit my shoulder at least a couple of times while moving, food options were down to just one option by the time it got to my row, the utensils were garbage (knife bent at a couple of places by the time I was done eating) the spoon was very flimsy plastic

Friendliest Flight Attendant I’ve seen since I flew on Southwest Airlines. The whole trip was outstanding…and arrived Early!

It was good overall except from Omaha to Denver when flight a was a repeatedly delayed apparently due to some issue at Denver. Communications could have been handled better. I had to board then deboard with luggage and board again

I didn’t have a seat assignment and my seat was very dirty on the flight from Frankfurt to Budapest.

Left an hour and a half after the listed time. Up side was it had TV screens on the seat.

No screens or meal options. Freezing cold. Dirty seats. Left late.

I was downgraded from first class to coach due to an airplane change. They pulled me out of line and I was the very last person to board the plane stuck in the middle seat with no overhead place to put my carry-.on. Very poor customer service.

Seat comfort was poor (no lumbar or lower back support).

The airplane seats were spacious and comfortable, and the flight attendants were friendly and attentive. The food was delicious like never before. The blankets and toiletries were thoughtfully provided. The captain's navigation was steady and reliable. In short, having flown with Starlux, I won't consider any other airline next time.

STOP MAKING THE SEATING SO CRAMPED. WE NEED A PASSENGER BILL OF RIGHTS!

The passenger in front of of me reclined their seat back all the way the entire flight. Their headrest was in my face the entire flight! I barely had room for the little plastic cup of water to fit on my tray table; can you make the seats and space between the rows any smaller??? You can’t even get up to use the restroom! Worst flight I’ve had in a very long time!

We had several flights and they were all on-time and flawless

My Frequent Flyer nber wasn't put on as I was told it was..... This resulted in a last group boarding and no priority tags on My bags.

Premium Economy Good crew, good service, excellent food. Seat back screen just not bright enough.

Terrible steward... Plane was quite empty... I asked to move "back" in the plane and the steward said no... Unnecessary power trip of mediocre people.

Flight was delayed an no one cares, or try to help passengers to get the conexión.

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

Information on your arrival and departure airports