United Flight 9K3129 Deals & Information (2025/2026)

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United Flight 3129 Route Deals From $95

The cheapest prices found with in the last 7 days for return flights were $149 and $95 for one-way flights to Luis Munoz Marin Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Jun 26 - Mon, Jun 30
STT
Cyril E. King
SJU
Luis Munoz Marin Intl.
$149 Roundtrip, found 20 hours ago
$149
Roundtrip
found 20 hours ago
Select United flight, departing Thu, Jun 26 from Cyril E. King to Luis Munoz Marin Intl., returning Mon, Jun 30, priced at $149 found 20 hours ago
Fri, May 30 - Mon, Jun 2
STT
Cyril E. King
SJU
Luis Munoz Marin Intl.
$1,217 Roundtrip, found 4 hours ago
$1,217
Roundtrip
found 4 hours ago
Select United flight, departing Fri, May 30 from Cyril E. King to Luis Munoz Marin Intl., returning Mon, Jun 2, priced at $1,217 found 4 hours ago