$388 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 1/31. 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$388
Liberia
Liberia1 stop$555
San José
San José2 stops$388
Liberia
Liberia1 stop$555

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

Sat, Jan 31 - Sat, Feb 7
Multiple Airlines Logo
7:20 pm - 7:45 am
TYS
-
SJO
13h 25m2 stops
Multiple Airlines Logo
12:33 pm - 8:39 am
SJO
-
TYS
19h 06m2 stops
$388Multiple Airlines
Sat, Jan 31 - Sat, Feb 7
Multiple Airlines Logo
5:59 pm - 12:22 pm
TYS
-
SJO
19h 23m1 stop
Multiple Airlines Logo
1:30 pm - 8:39 am
SJO
-
TYS
18h 09m1 stop
$408Multiple Airlines
Sat, Jan 31 - Sat, Feb 7
Avianca Logo
7:20 pm - 3:50 am
TYS
-
SJO
9h 30m1 stop
Avianca Logo
4:15 pm - 10:57 am
SJO
-
TYS
17h 42m2 stops
$409Avianca
Sat, Jan 31 - Sat, Feb 7
Multiple Airlines Logo
5:59 pm - 12:22 pm
TYS
-
SJO
19h 23m1 stop
Multiple Airlines Logo
4:15 pm - 5:53 pm
SJO
-
TYS
24h 38m2 stops
$413Multiple Airlines
Sat, Jan 31 - Sat, Feb 7
Multiple Airlines Logo
5:59 pm - 12:07 am
TYS
-
SJO
31h 08m3 stops
Multiple Airlines Logo
12:33 pm - 8:39 am
SJO
-
TYS
19h 06m2 stops
$432Multiple Airlines
Sat, Jan 31 - Sat, Feb 7
Avianca Logo
7:20 pm - 11:25 am
TYS
-
SJO
17h 05m2 stops
Avianca Logo
4:15 pm - 10:57 am
SJO
-
TYS
17h 42m2 stops
$462Avianca
Wed, Mar 18 - Wed, Mar 25
American Airlines Logo
6:00 am - 1:14 pm
TYS
-
SJO
9h 14m1 stop
American Airlines Logo
12:46 pm - 11:40 pm
SJO
-
TYS
8h 54m1 stop
$494American Airlines
Mon, Jan 12 - Thu, Jan 22
American Airlines Logo
11:19 am - 9:02 pm
TYS
-
SJO
10h 43m2 stops
American Airlines Logo
6:38 am - 3:46 pm
SJO
-
TYS
8h 08m1 stop
$498American Airlines
Fri, Jan 23 - Fri, Jan 30
American Airlines Logo
6:20 am - 1:54 pm
TYS
-
SJO
8h 34m1 stop
American Airlines Logo
8:00 am - 5:06 pm
SJO
-
TYS
8h 06m1 stop
$512American Airlines
Sat, Mar 7 - Fri, Mar 13
American Airlines Logo
6:23 pm - 11:42 am
TYS
-
LIR
18h 19m1 stop
American Airlines Logo
12:37 pm - 11:40 pm
LIR
-
TYS
9h 03m1 stop
$555American 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 August, when tickets cost $511 (return) on average. On the other hand, the most expensive months are July and June, when the average cost of round-trip tickets is $725 and $708 respectively.

What’s the cheapest day of the week to fly from Knoxville to Costa Rica?

The average price of all round-trip flights from Knoxville to Costa Rica clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Costa Rica on a Wednesday, as we generally find the cheapest rates on that day for this route. On the other hand, Friday is the most expensive day to fly from Knoxville to Costa Rica. For your return ticket, we recommend flying on a Monday and avoiding Saturdays for the best deals.

Good to know

Low seasonSeptember
Cheapest flight$388
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly and prices are also 6% 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.

  • What is the cheapest time of day to fly to Costa Rica?

    The cheapest time of day to fly to Costa Rica is generally at night, when round-trip flights cost $436 on average. Morning departures are around 12% more expensive than evening flights, on average. The most expensive time of day to fly to Costa Rica is generally in the morning, which is peak travel time and where the average cost of a ticket is $675.

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 8008 reviews
8.5Crew
7.9Comfort
8.1Boarding
7.9Entertainment
7.3Food
Airline reviews

I noticed that the planes seem to be outdated. There was no entertainment per se. Also, the waiting area did not have any working electrical outlets

10.0 ExcellentMargaret, Dec 2025
BOS - PIT
Read more Delta reviews

I noticed that the planes seem to be outdated. There was no entertainment per se. Also, the waiting area did not have any working electrical outlets

None of the airplane features were available during the flight.

Original flight was cancelled and when i was rebooked by the airline, they couldn't seat me in the same type of seat as I had originally booked (went from window/aisle to middle/middle and one was a bulkhead seat, and other wasn't in the same class)

Lady Pilot was perfect in every way wheels up to wheels down communication, professionalism, excellent on time departure and on time arrival, excellent communication! Fantastic job with Superb attitude!!

The food is terrible. The staff is wonderful. Comfort is good.

Left on time, a bit delayed due to headwinds most of the trip.

I fly Delta all the time, have Platinum Medallion status. But this route seems to have major problems with delays and seems to never leave on time! Have only taken it twice in the last two weeks, and each time it had delays of more than 1 hour... very disappointed!!!!

Getting to the flight was arduous and lengthy. The flight itself was good but the food option wasn’t a good selection. I need to do a Kosher option on my return. Flight crew were nice

Good seats in Main cabin, excellent service and excellent landing

My flight was cancelled with no explanation after I had already cleared security. I was given 4 options to rebook, only one being non-stop like I had paid for. I grabbed it. It was 4 plus hours later and then took off even later. Biggest complaint is that I booked early and had an aisle seat. They gave me a "window" seat in front of the exit row, so the seat did not decline. I weigh all of 103 #s and it was tight for me! For what I paid, I feel I was kind of ripped off. I think they should have given me the empty comfort seat for the inconvenience. There was no apology nor any explanation as to why the flight was cancelled. My guess is it benefitted Delta in some way.

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

United have really come back. Airport and boarding process is clear and good, app and information also very good

They charged a fee for 1st bag checked. Others in same party were free.

Flight was delayed 8 times. We were sitting at the airport for 14 hours. We got 2 hours of sleep (if that) on what was not meant to be a red-eye.

The movies offered were great. Staff were very pleasant and very efficient.

After a delay at the gate, C3, at Ohare on Sunday, I left my Blk ski coat on the bench at the gate, lost! Please review my lob claim, thx.

Very bad! They kept delaying my flight and wouldn’t do anything about it

Gate was overcrowded. Gate agents performed very well. Flight crew was top notch! Efficient & professional & courteous. Both meals not thermalized well. Dinner main dish was actually cold in the center. Almost inedible. Breakfast sandwich was lukewarm.

The boarding was as always, the crew tried their best but not enough. The food was a disaster I had dietary restrictions that were half met because the company did not loaded the food for the flight. The entertainment screen was fine but content was not and also they removed the free messaging option from the flight and they charged 30 dollars for that crappy bandwidth. This flight is not worth the cost and the company is going down on quality.

Not comparable to Qatar Airways services on flights to Doha. Flight attendants provided basic services; I was never recognized by name or as an Executive Platinum member. Restrooms were not kept clean during the flight.

Awful. They won’t help me with anything. I booked on American but they abdicated to Iberia. The ticket was overpriced. Everything negative

it was fine, decent flight... dont get food besides cookies or pretzels so not sure why you ask about food. same for entertainment..

I got sick nothing contagious but distressing and the care I received by Kayla? Keighly the flight attendant will be memorable for ever. Thank You

I got sick nothing contagious but distressing enough and the care I received on the flight was astounding.

Waaay too small plane. They also need to up the size of the overhead bins. I would love to keep me 3k with of camera equipment in my hard case baggahe instead of it being thrown into the belly of the plane

Attendants were pleasant and the flight was smooth and relaxed.

A little late at the start but all worked out well.

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

Information on your arrival and departure airports