United: Newark – Liberia, Costa Rica. $319 (Basic Economy) / $449 (Regular Economy). Roundtrip, including all Taxes

A good sale to the Guanacaste province of Costa Rica.

The $449 fare is the regular fare which allows for normal size carry-on and personal item in addition to advance seat assignment.

United also has a $319 fare but that is a Basic Economy fare. United Basic Economy fares do not allow for any advance seat assignments. Rather, your seat assignment will be randomly assigned during check-in. In addition, normal size carry-on that does not fit under the seat is charged a $50 fee each way + applicable gate check fees (but free if you have an United co-branded credit card or if you have United elite status). In addition, it does not allow for mileage earning unless you have a United co-branded credit card or elite status

Playa Samara, Costa Rica – Photo: Marissa Strniste

Sample Travel Date:

• This is just ONE SAMPLE travel date, for more availability, please follow the “Fare Availability” and “How to Search for Availability” instructions below

Fare Availability:

• Valid for travel from late October – early December or late January 2027. Availability is limited. Must purchase at least 7 days in advance of departure

• Please note that while this fare is valid at time of posting, if this post is more than two days old, the fare is likely gone.

How to Search for Availability:

• This is just to search for availability. To buy your tickets, scroll down to “How to Buy” section of this post

• Use Matrix Airfare Search by ITA Software and use the following search criteria:
  • Origin: EWR
  • Origin Advanced Routing Code:
    • Routing Codes: ua
    • Extension Codes:
      • This is instructing Matrix Airfare Search by ITA Software to search for the Basic Economy fare. Use those dates on United and you will be presented with the option to upgrade to the regular economy fare.
  • Destination:  LIR
  • Return Advanced Routing Code:
    • Routing Codes: ua
    • Extension Codes:
  • (Click on Advanced Codes link to enable advanced routing code input)
  • Select “See calendar of lowest fares”
  • Duration “3-10” (This is just a sample, you can use any 7 day date range like 3-10, 7-14 etc)
• Beginner’s Guide on How to Use Matrix by ITA Software
• How to Read Airfare Rules and Use It to Your Advantage

• The Matrix Airfare Search by ITA Software search page should be like below when all values are inputted

<img src="https://www.theflightdeal.com/wp-content/uploads/2026/08/2026-08-09_lir_ewr_ita-670×707.png” alt=”” loading=”lazy”>

• You cannot buy tickets using Matrix Airfare Search by ITA Software. To buy, follow our instructions in the “How to Buy” section below.

Fare Class:

• N (Basic Economy)
• G (Regular Economy)

Elite Qualifying Dollars:

Routing:

Stopover:

• Not permitted
• How to Take Advantage of a Stopover

Mileage:

• Miles Flown:4,382 miles
• Redeemable Miles:954 miles

How to Buy:

• Book on United with dates found on Matrix Airfare Search by ITA Software.

Accommodations

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Car Rentals

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Activities and Tours

• Viator – The world’s largest marketplace for destination activities and tours

Background Information:

• Visa: US Citizens – Not Required. Other nationals, check the TIMATIC Visa Database
• Currency: Costa Rican Colon (CRC). $1USD = 443 CRC

Tips for saving when using credit cards at international destinations:

• No Foreign Transaction Fee Credit Cards to save on international purchases
• Don’t get hit with Dynamic Currency Conversion
• Get your taxes refunded when shopping
• How to Avoid International Data Roaming Charges

For more of the latest cheap New York Flight Deals:

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