Cheap flights from Houston to Tras-os-Montes

View AU$1,014 flight on Thu, 7 Aug. 2025Opens in a new window

Popular airlines from Houston to Tras-os-Montes

  • Jetstar

    Jetstar

  • Qantas Airways

    Qantas Airways

  • Virgin Australia

    Virgin Australia

  • Scoot

    Scoot

  • American Airlines

    American Airlines

  • Emirates

    Emirates

  • United

    United

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 35% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from Houston (HOU) to Tras-os-Montes (OPO)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, 7 Aug. - Thu, 14 Aug.
IAH
Houston
OPO
Porto
AU$2,070 Return, found 5 days ago
AU$2,070
Return
found 5 days ago
Select Delta flight, departing Thu, 7 Aug. from Houston to Porto, returning Thu, 14 Aug., priced at AU$2,070 found 5 days ago
Lufthansa
Thu, 7 Aug. - Thu, 14 Aug.
IAH
Houston
OPO
Porto
AU$2,081 Return, found 5 days ago
AU$2,081
Return
found 5 days ago
Select Lufthansa flight, departing Thu, 7 Aug. from Houston to Porto, returning Thu, 14 Aug., priced at AU$2,081 found 5 days ago
Lufthansa
Thu, 7 Aug. - Thu, 14 Aug.
IAH
Houston
OPO
Porto
AU$2,089 Return, found 5 days ago
AU$2,089
Return
found 5 days ago
Select Lufthansa flight, departing Thu, 7 Aug. from Houston to Porto, returning Thu, 14 Aug., priced at AU$2,089 found 5 days ago
Delta
Thu, 7 Aug. - Thu, 14 Aug.
IAH
Houston
OPO
Porto
AU$2,092 Return, found 5 days ago
AU$2,092
Return
found 5 days ago
Select Delta flight, departing Thu, 7 Aug. from Houston to Porto, returning Thu, 14 Aug., priced at AU$2,092 found 5 days ago
KLM
Thu, 7 Aug. - Thu, 14 Aug.
IAH
Houston
OPO
Porto
AU$2,111 Return, found 5 days ago
AU$2,111
Return
found 5 days ago
Select KLM flight, departing Thu, 7 Aug. from Houston to Porto, returning Thu, 14 Aug., priced at AU$2,111 found 5 days ago
United
Thu, 7 Aug. - Thu, 14 Aug.
IAH
Houston
OPO
Porto
AU$2,128 Return, found 5 days ago
AU$2,128
Return
found 5 days ago
Select United flight, departing Thu, 7 Aug. from Houston to Porto, returning Thu, 14 Aug., priced at AU$2,128 found 5 days ago
TAP Portugal
Thu, 7 Aug. - Thu, 14 Aug.
IAH
Houston
OPO
Porto
AU$2,656 Return, found 5 days ago
AU$2,656
Return
found 5 days ago
Select TAP Portugal flight, departing Thu, 7 Aug. from Houston to Porto, returning Thu, 14 Aug., priced at AU$2,656 found 5 days ago
*Available to Expedia members.