Flights from Knoxville to Costa Rica (TYS to CR)

Discover more affordable routes and cheaper dates from Knoxville to Costa Rica (TYS to CR) within a date range.

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  • US$1394.19
    Allegiant AirAvianca
    12:45pm - 3:35am
    Mon Jul 28th 2025
    16h 50m
    Knoxville (TYS) → San José (SJO)
    1 Stop
    AviancaAviancaAllegiant Air
    7:45pm - 4:59pm
    Thu Sep 4th 2025
    19h 14m
    San José (SJO) → Knoxville (TYS)
    2 Stops

    Mon Jul 28th 2025 Allegiant Air · G4 1397 Depart at 12:45pm from Knoxville (TYS) Fly for 1h 38m Arrive at 2:23pm in Washington, D.C. (IAD)

    Layover in Washington, D.C. for 10h 42m

    Tue Jul 29th 2025 Avianca · AV 663 Depart at 1:05am from Washington, D.C. (IAD) Fly for 4h 30m Arrive at 3:35am in San José (SJO)

    Stay in San José for 37 nights

    Thu Sep 4th 2025 Avianca · AV 616 Depart at 7:45pm from San José (SJO) Fly for 1h 20m Arrive at 9:05pm in San Salvador (SAL)

    Layover in San Salvador for 1h 0m

    Thu Sep 4th 2025 Avianca · AV 580 Depart at 10:05pm from San Salvador (SAL) Fly for 4h 15m Arrive at 4:20am in Washington, D.C. (IAD)

    Layover in Washington, D.C. for 10h 59m

    Fri Sep 5th 2025 Allegiant Air · G4 3060 Depart at 3:19pm from Washington, D.C. (IAD) Fly for 1h 40m Arrive at 4:59pm in Knoxville (TYS)

  • US$1394.19
    Allegiant AirAvianca
    12:45pm - 3:35am
    Mon Aug 4th 2025
    16h 50m
    Knoxville (TYS) → San José (SJO)
    1 Stop
    AviancaAviancaAllegiant Air
    7:45pm - 4:59pm
    Thu Sep 4th 2025
    19h 14m
    San José (SJO) → Knoxville (TYS)
    2 Stops

    Mon Aug 4th 2025 Allegiant Air · G4 1397 Depart at 12:45pm from Knoxville (TYS) Fly for 1h 38m Arrive at 2:23pm in Washington, D.C. (IAD)

    Layover in Washington, D.C. for 10h 42m

    Tue Aug 5th 2025 Avianca · AV 663 Depart at 1:05am from Washington, D.C. (IAD) Fly for 4h 30m Arrive at 3:35am in San José (SJO)

    Stay in San José for 30 nights

    Thu Sep 4th 2025 Avianca · AV 616 Depart at 7:45pm from San José (SJO) Fly for 1h 20m Arrive at 9:05pm in San Salvador (SAL)

    Layover in San Salvador for 1h 0m

    Thu Sep 4th 2025 Avianca · AV 580 Depart at 10:05pm from San Salvador (SAL) Fly for 4h 15m Arrive at 4:20am in Washington, D.C. (IAD)

    Layover in Washington, D.C. for 10h 59m

    Fri Sep 5th 2025 Allegiant Air · G4 3060 Depart at 3:19pm from Washington, D.C. (IAD) Fly for 1h 40m Arrive at 4:59pm in Knoxville (TYS)

  • US$1425.19
    Allegiant AirAvianca
    12:45pm - 3:35am
    Mon Jul 28th 2025
    16h 50m
    Knoxville (TYS) → San José (SJO)
    1 Stop
    AviancaAviancaAllegiant Air
    7:45pm - 4:59pm
    Thu Sep 11th 2025
    19h 14m
    San José (SJO) → Knoxville (TYS)
    2 Stops

    Mon Jul 28th 2025 Allegiant Air · G4 1397 Depart at 12:45pm from Knoxville (TYS) Fly for 1h 38m Arrive at 2:23pm in Washington, D.C. (IAD)

    Layover in Washington, D.C. for 10h 42m

    Tue Jul 29th 2025 Avianca · AV 663 Depart at 1:05am from Washington, D.C. (IAD) Fly for 4h 30m Arrive at 3:35am in San José (SJO)

    Stay in San José for 44 nights

    Thu Sep 11th 2025 Avianca · AV 616 Depart at 7:45pm from San José (SJO) Fly for 1h 20m Arrive at 9:05pm in San Salvador (SAL)

    Layover in San Salvador for 1h 0m

    Thu Sep 11th 2025 Avianca · AV 580 Depart at 10:05pm from San Salvador (SAL) Fly for 4h 15m Arrive at 4:20am in Washington, D.C. (IAD)

    Layover in Washington, D.C. for 10h 59m

    Fri Sep 12th 2025 Allegiant Air · G4 3060 Depart at 3:19pm from Washington, D.C. (IAD) Fly for 1h 40m Arrive at 4:59pm in Knoxville (TYS)

  • US$1425.19
    Allegiant AirAvianca
    12:45pm - 3:35am
    Mon Aug 4th 2025
    16h 50m
    Knoxville (TYS) → San José (SJO)
    1 Stop
    AviancaAviancaAllegiant Air
    7:45pm - 4:59pm
    Thu Sep 11th 2025
    19h 14m
    San José (SJO) → Knoxville (TYS)
    2 Stops

    Mon Aug 4th 2025 Allegiant Air · G4 1397 Depart at 12:45pm from Knoxville (TYS) Fly for 1h 38m Arrive at 2:23pm in Washington, D.C. (IAD)

    Layover in Washington, D.C. for 10h 42m

    Tue Aug 5th 2025 Avianca · AV 663 Depart at 1:05am from Washington, D.C. (IAD) Fly for 4h 30m Arrive at 3:35am in San José (SJO)

    Stay in San José for 37 nights

    Thu Sep 11th 2025 Avianca · AV 616 Depart at 7:45pm from San José (SJO) Fly for 1h 20m Arrive at 9:05pm in San Salvador (SAL)

    Layover in San Salvador for 1h 0m

    Thu Sep 11th 2025 Avianca · AV 580 Depart at 10:05pm from San Salvador (SAL) Fly for 4h 15m Arrive at 4:20am in Washington, D.C. (IAD)

    Layover in Washington, D.C. for 10h 59m

    Fri Sep 12th 2025 Allegiant Air · G4 3060 Depart at 3:19pm from Washington, D.C. (IAD) Fly for 1h 40m Arrive at 4:59pm in Knoxville (TYS)

  • US$1446.19
    Allegiant AirAviancaAvianca
    12:45pm - 11:35pm
    Mon Aug 4th 2025
    12h 50m
    Knoxville (TYS) → San José (SJO)
    2 Stops
    AviancaAviancaAllegiant Air
    7:45pm - 4:59pm
    Thu Sep 4th 2025
    19h 14m
    San José (SJO) → Knoxville (TYS)
    2 Stops

    Mon Aug 4th 2025 Allegiant Air · G4 1397 Depart at 12:45pm from Knoxville (TYS) Fly for 1h 38m Arrive at 2:23pm in Washington, D.C. (IAD)

    Layover in Washington, D.C. for 2h 42m

    Mon Aug 4th 2025 Avianca · AV 583 Depart at 5:05pm from Washington, D.C. (IAD) Fly for 4h 25m Arrive at 7:30pm in San Salvador (SAL)

    Layover in San Salvador for 2h 55m

    Mon Aug 4th 2025 Avianca · AV 627 Depart at 10:25pm from San Salvador (SAL) Fly for 1h 10m Arrive at 11:35pm in San José (SJO)

    Stay in San José for 30 nights

    Thu Sep 4th 2025 Avianca · AV 616 Depart at 7:45pm from San José (SJO) Fly for 1h 20m Arrive at 9:05pm in San Salvador (SAL)

    Layover in San Salvador for 1h 0m

    Thu Sep 4th 2025 Avianca · AV 580 Depart at 10:05pm from San Salvador (SAL) Fly for 4h 15m Arrive at 4:20am in Washington, D.C. (IAD)

    Layover in Washington, D.C. for 10h 59m

    Fri Sep 5th 2025 Allegiant Air · G4 3060 Depart at 3:19pm from Washington, D.C. (IAD) Fly for 1h 40m Arrive at 4:59pm in Knoxville (TYS)

  • US$1477.19
    Allegiant AirAviancaAvianca
    12:45pm - 11:35pm
    Mon Aug 4th 2025
    12h 50m
    Knoxville (TYS) → San José (SJO)
    2 Stops
    AviancaAviancaAllegiant Air
    7:45pm - 4:59pm
    Thu Sep 11th 2025
    19h 14m
    San José (SJO) → Knoxville (TYS)
    2 Stops

    Mon Aug 4th 2025 Allegiant Air · G4 1397 Depart at 12:45pm from Knoxville (TYS) Fly for 1h 38m Arrive at 2:23pm in Washington, D.C. (IAD)

    Layover in Washington, D.C. for 2h 42m

    Mon Aug 4th 2025 Avianca · AV 583 Depart at 5:05pm from Washington, D.C. (IAD) Fly for 4h 25m Arrive at 7:30pm in San Salvador (SAL)

    Layover in San Salvador for 2h 55m

    Mon Aug 4th 2025 Avianca · AV 627 Depart at 10:25pm from San Salvador (SAL) Fly for 1h 10m Arrive at 11:35pm in San José (SJO)

    Stay in San José for 37 nights

    Thu Sep 11th 2025 Avianca · AV 616 Depart at 7:45pm from San José (SJO) Fly for 1h 20m Arrive at 9:05pm in San Salvador (SAL)

    Layover in San Salvador for 1h 0m

    Thu Sep 11th 2025 Avianca · AV 580 Depart at 10:05pm from San Salvador (SAL) Fly for 4h 15m Arrive at 4:20am in Washington, D.C. (IAD)

    Layover in Washington, D.C. for 10h 59m

    Fri Sep 12th 2025 Allegiant Air · G4 3060 Depart at 3:19pm from Washington, D.C. (IAD) Fly for 1h 40m Arrive at 4:59pm in Knoxville (TYS)

  • US$1656.19
    Allegiant AirAviancaAvianca
    12:45pm - 11:35pm
    Mon Aug 4th 2025
    12h 50m
    Knoxville (TYS) → San José (SJO)
    2 Stops
    AviancaAviancaAllegiant Air
    5:05am - 11:14pm
    Mon Sep 8th 2025
    16h 9m
    San José (SJO) → Knoxville (TYS)
    2 Stops

    Mon Aug 4th 2025 Allegiant Air · G4 1397 Depart at 12:45pm from Knoxville (TYS) Fly for 1h 38m Arrive at 2:23pm in Washington, D.C. (IAD)

    Layover in Washington, D.C. for 2h 42m

    Mon Aug 4th 2025 Avianca · AV 583 Depart at 5:05pm from Washington, D.C. (IAD) Fly for 4h 25m Arrive at 7:30pm in San Salvador (SAL)

    Layover in San Salvador for 2h 55m

    Mon Aug 4th 2025 Avianca · AV 627 Depart at 10:25pm from San Salvador (SAL) Fly for 1h 10m Arrive at 11:35pm in San José (SJO)

    Stay in San José for 34 nights

    Mon Sep 8th 2025 Avianca · AV 626 Depart at 5:05am from San José (SJO) Fly for 1h 20m Arrive at 6:25am in San Salvador (SAL)

    Layover in San Salvador for 3h 5m

    Mon Sep 8th 2025 Avianca · AV 582 Depart at 9:30am from San Salvador (SAL) Fly for 4h 15m Arrive at 3:45pm in Washington, D.C. (IAD)

    Layover in Washington, D.C. for 5h 49m

    Mon Sep 8th 2025 Allegiant Air · G4 1402 Depart at 9:34pm from Washington, D.C. (IAD) Fly for 1h 40m Arrive at 11:14pm in Knoxville (TYS)

@sarahbb1
Sarah Belizaire
@sarahbb1

Have flexible travel plans or looking for alternative routes given the chaos? Check out all the connection possibilities via a super helpful site created by @ismaelyws flightlist.io thanks to @andy_travels for the recommendation #travel #flights

@eyupitsjohn
John Ford
@eyupitsjohn

There seem to be lots of sites launching at the moment that promise to find you cheap flights but not many have the professional finish of Flightlist by @ismaelyws #travel #flights

@oamingsonaa
Roaming Sonaa
@roamingsonaa

For people wanting to maximize their trips, Flightlist is my newest travel hack for uncovering the coolest routes at irresistible prices. No stress, no annoying ads — just seamless flight booking with amazing functionality.

@andy_travels
Andy Travels
@andy_travels

@ismaelyws Just tried out Flightlist for the first time. Really nice idea, well made, and just what I need at the moment 👍

@travelwitbender
Travel With Bender
@travelwitbender

Did you spot my recent article about how to score cheap one way flights? ✈️ FlightList is my new secret tool for discovering cheap routes, within a departure date range. Plus you can also search by country/region for departures & destinations. Powerful! 💪

@travel.with.wes
Wesley Mergard
@travel.with.wes

One useful tool I've found for evaluating different departure and return dates is called FlightList.io. You can quickly scan different travel date ranges, carriers and one way flight options to easily determine the cheapest flight combinations for your trip.

Explore Flight Options

FlightList Blog

Flightlist Interviews 7 Travel Experts On Why They Book One Way Flights
Flightlist Interviews 7 Travel Experts On Why They Book One Way Flights
Why I built FlightList & solved my own problem
Why I Built FlightList & Solved My Own Problem

About FlightList

❝Founded by a remote worker and frequent flyer, who discovered that the best deals come from searching with flexible dates across entire countries or regions. Our streamlined platform strips away the clutter found on typical travel sites, offering a clean interface that focuses solely on finding cost-effective flights. Unlike traditional booking sites, FlightList allows users to search by date ranges and broad destinations, unveiling opportunities that rigid parameters often miss. Our filters let travelers tailor searches to their specific needs, whether they're digital nomads seeking their next adventure or budget-conscious explorers maximizing travel funds. We've made finding cheap flights into a quicker and easier experience, empowering users to discover just how far their budget can take them.❞

Hans Desjarlais, Founder Hans Desjarlais Profile Picture