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Cheap flights from Knoxville to Costa Rica from $138

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to Costa Rica departing on 1/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:32 pm - 10:19 amTYS-SJO
16h 47m1 stop
Multiple Airlines Logo
12:39 pm - 9:49 pmSJO-TYS
8h 10m1 stop
$339Multiple Airlines
Find Deal
Mon, Nov 24 - Mon, Dec 8
Multiple Airlines Logo
4:47 pm - 12:22 pmTYS-SJO
20h 35m1 stop
Multiple Airlines Logo
1:30 pm - 10:08 amSJO-TYS
19h 38m1 stop
$382Multiple Airlines
Find Deal
Wed, Feb 4 - Tue, Feb 10
Multiple Airlines Logo
8:30 am - 12:22 pmTYS-SJO
28h 52m1 stop
Multiple Airlines Logo
1:30 pm - 1:40 pmSJO-TYS
23h 10m1 stop
$390Multiple Airlines
Find Deal
Mon, Jan 12 - Thu, Jan 22
Multiple Airlines Logo
6:32 pm - 12:15 pmTYS-SJO
18h 43m2 stops
Multiple Airlines Logo
12:39 pm - 9:49 pmSJO-TYS
8h 10m1 stop
$391Multiple Airlines
Find Deal
Mon, Nov 24 - Mon, Dec 8
American Airlines Logo
6:37 pm - 11:15 amTYS-LIR
17h 38m2 stops
American Airlines Logo
12:55 pm - 10:32 amLIR-TYS
19h 37m2 stops
$541American Airlines
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Sat, Mar 7 - Fri, Mar 13
American Airlines Logo
6:37 pm - 11:15 amTYS-LIR
17h 38m2 stops
American Airlines Logo
2:55 pm - 10:32 amLIR-TYS
17h 37m2 stops
$573American Airlines
Find Deal
Sat, Mar 7 - Fri, Mar 13
American Airlines Logo
6:37 pm - 11:15 amTYS-LIR
17h 38m2 stops
American Airlines Logo
12:55 pm - 10:10 pmLIR-TYS
7h 15m1 stop
$747American Airlines
Find Deal
Sat, Mar 7 - Fri, Mar 13
American Airlines Logo
6:20 pm - 11:13 amTYS-LIR
17h 53m1 stop
American Airlines Logo
12:55 pm - 10:32 amLIR-TYS
19h 37m2 stops
$779American Airlines
Find Deal
Sat, Mar 7 - Fri, Mar 13
United Airlines Logo
7:00 pm - 11:55 amTYS-LIR
17h 55m1 stop
United Airlines Logo
1:01 pm - 8:54 pmLIR-TYS
29h 53m1 stop
$890United Airlines
Find Deal
Sat, Mar 7 - Fri, Mar 13
United Airlines Logo
7:00 pm - 11:55 amTYS-LIR
17h 55m1 stop
United Airlines Logo
1:01 pm - 5:25 pmLIR-TYS
26h 24m1 stop
$934United Airlines
Find Deal
Sat, Mar 7 - Fri, Mar 13

Avianca flights from Knoxville to Costa Rica

Our best Avianca deals on Knoxville to Costa Rica flight tickets
Avianca
Jan 31
TYS7:20 pmKnoxville McGhee Tyson
9h 30m
1 stop
SJO3:50 amSan José Juan Santamaria Intl
Feb 9
SJO4:15 pmSan José Juan Santamaria Intl
17h 42m
2 stops
TYS10:57 amKnoxville McGhee Tyson
$458
Find similar
Avianca
Feb 21
TYS7:25 pmKnoxville McGhee Tyson
13h 20m
2 stops
SJO7:45 amSan José Juan Santamaria Intl
Feb 28
SJO4:15 pmSan José Juan Santamaria Intl
17h 34m
2 stops
TYS10:49 amKnoxville McGhee Tyson
$473
Find similar
Avianca
Jan 31
TYS7:20 pmKnoxville McGhee Tyson
13h 25m
2 stops
SJO7:45 amSan José Juan Santamaria Intl
Feb 14
SJO4:15 pmSan José Juan Santamaria Intl
17h 34m
2 stops
TYS10:49 amKnoxville McGhee Tyson
$481
Find similar

United Airlines flights from Knoxville to Costa Rica

Our best United Airlines deals on Knoxville to Costa Rica flight tickets
United Airlines
Nov 15
TYS7:00 amKnoxville McGhee Tyson
7h 15m
1 stop
SJO1:15 pmSan José Juan Santamaria Intl
Nov 16
SJO2:20 pmSan José Juan Santamaria Intl
8h 24m
1 stop
TYS11:44 pmKnoxville McGhee Tyson
$590
Find similar
United Airlines
Mar 7
TYS7:00 pmKnoxville McGhee Tyson
17h 55m
1 stop
LIR11:55 amLiberia
Mar 13
LIR1:01 pmLiberia
29h 53m
1 stop
TYS8:54 pmKnoxville McGhee Tyson
$890
Find similar
United Airlines
Mar 7
TYS7:00 pmKnoxville McGhee Tyson
17h 55m
1 stop
LIR11:55 amLiberia
Mar 13
LIR1:01 pmLiberia
26h 24m
1 stop
TYS5:25 pmKnoxville McGhee Tyson
$934
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Knoxville to Costa Rica that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated November 13, 2025.
Use the filters below to find and compare flights from Knoxville to Costa Rica that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

KnoxvilleSan José

TYS - SJO

TYSSJO

Knoxville McGhee Tyson

Mon 11/24

6:32 pm-10:19 am

1 stop16h 47m

San José Juan Santamaria Intl

Mon 12/8

12:39 pm-9:49 pm

1 stop8h 10m

$339

KnoxvilleSan José

TYS - SJO

TYSSJO

Knoxville McGhee Tyson

Wed 2/4

4:47 pm-12:22 pm

1 stop20h 35m

San José Juan Santamaria Intl

Tue 2/10

1:30 pm-10:08 am

1 stop19h 38m

$382

KnoxvilleSan José

TYS - SJO

TYSSJO

Knoxville McGhee Tyson

Mon 1/12

8:30 am-12:22 pm

1 stop28h 52m

San José Juan Santamaria Intl

Thu 1/22

1:30 pm-1:40 pm

1 stop23h 10m

$390

KnoxvilleSan José

TYS - SJO

TYSSJO

Knoxville McGhee Tyson

Mon 11/24

6:32 pm-12:15 pm

2 stops18h 43m

San José Juan Santamaria Intl

Mon 12/8

12:39 pm-9:49 pm

1 stop8h 10m

$391

KnoxvilleLiberia

TYS - LIR

TYSLIR

Knoxville McGhee Tyson

Sat 3/7

6:37 pm-11:15 am

2 stops17h 38m

Liberia

Fri 3/13

12:55 pm-10:32 am

2 stops19h 37m

$541

KnoxvilleLiberia

TYS - LIR

TYSLIR

Knoxville McGhee Tyson

Sat 3/7

6:37 pm-11:15 am

2 stops17h 38m

Liberia

Fri 3/13

2:55 pm-10:32 am

2 stops17h 37m

$573

KnoxvilleLiberia

TYS - LIR

TYSLIR

Knoxville McGhee Tyson

Sat 3/7

6:37 pm-11:15 am

2 stops17h 38m

Liberia

Fri 3/13

12:55 pm-10:10 pm

1 stop7h 15m

$747

KnoxvilleLiberia

TYS - LIR

TYSLIR

Knoxville McGhee Tyson

Sat 3/7

6:20 pm-11:13 am

1 stop17h 53m

Liberia

Fri 3/13

12:55 pm-10:32 am

2 stops19h 37m

$779

KnoxvilleLiberia

TYS - LIR

TYSLIR

Knoxville McGhee Tyson

Sat 3/7

7:00 pm-11:55 am

1 stop17h 55m

Liberia

Fri 3/13

1:01 pm-8:54 pm

1 stop29h 53m

$890

KnoxvilleLiberia

TYS - LIR

TYSLIR

Knoxville McGhee Tyson

Sat 3/7

7:00 pm-11:55 am

1 stop17h 55m

Liberia

Fri 3/13

1:01 pm-5:25 pm

1 stop26h 24m

$934

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Costa Rica from

How to get the cheapest flight ticket from Knoxville to Costa Rica

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Costa Rica?

The cheapest month to fly to Costa Rica from Knoxville is in August. Flight prices, which tend to average around $511, are often lower during this time because this is during the off-season. If you’re not able to fly to Costa Rica in August, then November is your next best option. Flight prices from Knoxville to Costa Rica during November average around $530.

What is the cheapest day to depart on your flight to Costa Rica?

According to our data, Wednesday is the cheapest day to fly to Costa Rica from Knoxville. The lowest ticket price found for a Wednesday departure recently was $565. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $766. These prices are subject to change though, so be sure to set up a Price Alert for flights to Costa Rica.

What is the cheapest time of day to depart on your flight to Costa Rica?

In the evening is the cheapest time of day to fly from Knoxville to Costa Rica when you can find flight prices for as low as $436. Flying to Costa Rica in the evening is an ideal time because this is during off-peak travel hours. Flights to Costa Rica are more costly in the morning, with an average ticket price of $675. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Cheap Knoxville to Costa Rica flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Knoxville to Costa Rica

Direct flights

None
There are no direct flights from Knoxville to Costa Rica. There are no popular flight routes from Knoxville to Costa Rica.
Search flight deals

  • When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to Costa Rica?

    Prices for flights from Knoxville McGhee Tyson Airport to Costa Rica are updated daily.

  • How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to Costa Rica?

  • How old do you have to be to fly from Knoxville McGhee Tyson Airport to Costa Rica?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to Costa Rica.

  • What documentation or ID do you need to fly to Costa Rica?

    The travel and health documents you'll need for your trip to Costa Rica may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Costa Rica. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Knoxville to Costa Rica

Compare and see reviews for airlines that fly from Knoxville to Costa Rica with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $456Free CancellationRating
7.9
8,007 reviews
Search Delta flights
American AirlinesPriceFrom $484Free CancellationRating
7.2
11,051 reviews
Search American Airlines flights
United AirlinesPriceFrom $491Free CancellationRating
7.4
9,017 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Knoxville to Costa Rica?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Knoxville to Costa Rica for you.

Can I find flights from Knoxville to Costa Rica with flexible booking policies on momondo?

All flight searches from Knoxville to Costa Rica on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Knoxville to Costa Rica?

momondo provides multiple filters to help you find the best flight to Costa Rica from Knoxville. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Knoxville to Costa Rica right now. Can momondo alert me if prices change?

Price alerts on flights to Costa Rica from Knoxville are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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