$405 Find Cheap Flights from Knoxville to Costa Rica

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Knoxville to Costa Rica departing on 3/12. 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$405
Liberia
Liberia1 stop$543
San José
San José1 stop$405
Liberia
Liberia1 stop$543

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

jue., mar. 12 - mié., mar. 25
Multiple Airlines Logo
9:43 pm - 11:19 am
TYS
-
SJO
15h 36m1 stop
Multiple Airlines Logo
12:31 pm - 12:03 pm
SJO
-
TYS
21h 32m1 stop
$405Multiple Airlines
jue., mar. 12 - mié., mar. 25
Multiple Airlines Logo
9:43 pm - 11:19 am
TYS
-
SJO
15h 36m1 stop
Multiple Airlines Logo
12:31 pm - 12:03 pm
SJO
-
TYS
21h 32m1 stop
$414Multiple Airlines
jue., mar. 12 - mié., mar. 25
Multiple Airlines Logo
9:43 pm - 11:19 am
TYS
-
SJO
15h 36m1 stop
Multiple Airlines Logo
7:50 pm - 5:35 pm
SJO
-
TYS
19h 45m2 stops
$424Multiple Airlines
mié., jun. 24 - mar., jun. 30
American Airlines Logo
6:00 am - 11:20 am
TYS
-
LIR
7h 20m1 stop
American Airlines Logo
2:45 pm - 10:48 am
LIR
-
TYS
18h 03m2 stops
$543American Airlines
sáb., jun. 27 - sáb., jul. 4
American Airlines Logo
8:11 pm - 11:36 am
TYS
-
LIR
17h 25m1 stop
American Airlines Logo
2:45 pm - 11:59 pm
LIR
-
TYS
7h 14m1 stop
$558American Airlines
sáb., mar. 7 - vie., mar. 13
American Airlines Logo
5:00 pm - 1:13 pm
TYS
-
LIR
21h 13m2 stops
American Airlines Logo
12:21 pm - 11:20 am
LIR
-
TYS
20h 59m2 stops
$561American Airlines
sáb., jun. 27 - sáb., jul. 4
American Airlines Logo
6:05 pm - 11:20 am
TYS
-
LIR
19h 15m2 stops
American Airlines Logo
2:45 pm - 11:59 pm
LIR
-
TYS
7h 14m1 stop
$563American Airlines
lun., mar. 9 - mié., mar. 11
Delta Logo
5:30 am - 12:50 pm
TYS
-
LIR
9h 20m1 stop
Delta Logo
1:05 pm - 11:51 pm
LIR
-
TYS
8h 46m1 stop
$576Delta
lun., mar. 9 - mié., mar. 11
Delta Logo
11:18 am - 12:30 pm
TYS
-
LIR
27h 12m2 stops
Delta Logo
1:05 pm - 11:51 pm
LIR
-
TYS
8h 46m1 stop
$581Delta
lun., mar. 9 - jue., mar. 12
Delta Logo
11:18 am - 12:30 pm
TYS
-
LIR
27h 12m2 stops
Delta Logo
1:45 pm - 4:43 pm
LIR
-
TYS
24h 58m2 stops
$604Delta
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 August, when tickets cost $511 (return) on average. On the other hand, the most expensive months are February and October, when the average cost of round-trip tickets is $748 and $699 respectively.

Good to know

Low seasonSeptember
Cheapest flight$405
Most popular time to fly and prices are also 4% 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 8039 reviews
8.5Crew
7.2Food
7.8Entertainment
8.1Boarding
7.9Comfort
Airline reviews

Food is basically Sun Chips, cookies or Cheezits. I had an exit row seat so I had plenty of room. The crew was very nice and efficient. Pilot kept us informed. Pretty good flight.

8.0 ExcellentG, Jan 2026
FLL - ATL
Read more Delta reviews

Food is basically Sun Chips, cookies or Cheezits. I had an exit row seat so I had plenty of room. The crew was very nice and efficient. Pilot kept us informed. Pretty good flight.

Air travel sucks. It continues to be awful for all airlines. No shame on delta alone.

It was Delta, but the flight attendants were stressful and disrespectful. I am a diamond member a travel weekly. I have not had a negative thing to share in quite some time. But this was noticeable.

Comfort Plus seat 11E seemed smaller than prior flights. The movie selection is good. Watched most of the most recent Tron movie. I'll watch the remaining part later as my movie is saved in the Delta Seatback Experience.

Flight was late from Newark to Atlanta, I asked flight attendant to please let my family of 3 out first when we landed to Atlanta because we were late for our connecting flight to Quito. She didn't and we were late for 5 minutes we couldn't board the plane and spend hours trying to get another flight with customer service for the next day.

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

Late delayed flight delays boarding and delays leaving and delays on arrival too. Cramped plane no room no food.

DTW line is too long. The flights from DTW to BWI are always delayed for unknown reasons.

Delta canceled our flight and we had to scramble to find another airline to get home. Phoenix is not a delta hub so they didn’t have another plane. It would have been a red eye though Salt Lake City. Getting in at 5am. No bueno.

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

Teeny tiny bathrooms, crew was not realistic about when we'd arrive.

Check-in, boarding and the flight from Phoenix to Houston was quick and easy. The flight from Houston to Shreveport was delayed 5 hours. It was frustrating but I think United handled it the best they could.

Some flight attendants were great others were cranky. Seats were very tight and sitting on an aisle was very hard as the carts and people walking constantly bumped shoulder and arm.

It was great with United overall except for two things. 1) It was a 5-hour flight and we were with kids, so we were asking for extra snacks. They were extremely reticent to dole them out even though there wasn't any meal and the kids were starting to hit their limit towards the end. 2) Baggage didn't arrive until 80 minutes after we landed.

They lost my luggage, so, not happy. The crew was nice but my suitcases never made it, still trying to find out what happened!

The staff was hospitable and professional. The seat had a bit of wear. The winner shade was stuck 1/4 open. I received the best of both worlds. The morning sun was able to come in and blind the screen i was trying to use while at the same time it was too low to look out and enjoy the view. Rather embarrassing for a 1st class ticket.

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

The flights were on time which was great give. It was holiday travel season and there’d been some weather issues. The only complaint and this is every time with United is the terrible seat design. The head rest is not built for comfort and having my neck bent forward for a cross country trip reminded me while I try not to take United flights as a rule.

I’m so sorry, I can’t remember her name, I believe it was Dimpti. She was stellar, also a mature Asian flight attendant, lots of flowers in her hair, just as amazing! But literally the crew was AWESOME . Only downside is there weren’t any charging outlets. Maybe I needed to ask a flight attendant , but it would’ve been nice to have one easily accessible.

The flight was delayed by two de-icings. The seatbelt did not work correctly. It did not stay tight.

The flight was good. We had to spend almost an hour on the tarmac when we arrived in Dallas. Waiting for a gate. What’s the point of arriving early if you have no gate to park at?

Lower WiFi prices; allow us to see our flight on a map; more variety of drink choices.

So excited very proud first of all I wanna thank kayak all updates very professional and fast alart And amazing cabin crew so nice to me they deserve big salute

UGH I HAD TO MISS MY FIRST FLIGHT TO TAMPA CAUSE OF THE 10 MINUTE DELAY OF THE ORLANDO TO MIAMI ONE SO THEY HAD ME GET ANOTHER TICKET. I AM NOT HAPPY AT ALL BECAUSE IT MADE ME MISS MY CONNECTING FLIGHT FROM TAMPA TO LONDON AND FORCED ME TO MISS A DAY AT MY ROOM IN THE UK.

Wish they didnt delay off-boarding for 10 minutes so i could connect to my flight from miami to tampa

We experienced gate changes and a long delay. My seat was dirty when I boarded and I had to use wipes to clean it myself. There was an unpleasant and overpowering cleaning product scent on the plane as well that lingered through the flight.

Seats were much more cramped then on the 737. Narrower and rows closer together. Flight was absolutely packed and the plugs under the seats didn't work. Was forced to check my bag even though previous flight had no issue with it.

Good food & refreshment. The seats and entrainment screens are modern compared to others. The staff though pleasant serve and attend to passengers based on nationality. Some get served first others last regardless of their seating positions.

It was fine. My connection in Charlotte to go to WPB was too late and I had to spend the night in the Charlotte Airport in the mini suites.

The flight was on time and arrived early. The crew were friendly and helpful.

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

Information on your arrival and departure airports