Every Houston–Porto fare we track, measured against the route's typical price whenever there is enough cached history to build one. Subscribe in any RSS reader for free single-route price alerts — no account, no email needed.https://flight.dealsen-ushttps://flight.deals/flights/houston-to-porto/#2027-04-06-2027-04-27-UAhttps://flight.deals/flights/houston-to-porto/#2027-04-06-2027-04-27-UAHOU → OPO round-trip on United, 2027-04-06 to 2027-04-27 (21 nights). Cached fare $736. Not enough cached history on this route yet to say what it usually costs.Fri, 21 Aug 2026 06:01:13 GMT