First-class award flights from Porto (OPO) to Houston (IAH)
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In the last 30 days AwardTool saw first-class award space on 2 programs for OPO→IAH. Lowest: 200,000 miles + $57.19 with United MileagePlus, which showed first-class award space on 11 dates. No nonstop first-class award was seen in the last 30 days.
Prices observed – ; newest observation .
Page regenerated from the Oct 19, 2026 data snapshot (normally daily). Summary last changed . Seats change quickly.
- Lowest observed
- 200,000 miles + $57.19
- United MileagePlus
- Programs with space
- 2 of 10
- programs seen on this route
- Most dates seen
- 18 of 21
- dates checked · Delta SkyMiles
- Nonstop
- Not seen
- in the last 30 days
Compare programs for first class
The lowest one-way first-class award each program showed on OPO→IAH, sorted by points.
| Program | Points + taxes | Stops | Airlines seen | Seats | Dates seen | Newest observation | |
|---|---|---|---|---|---|---|---|
| United MileagePlusLowest observed | 200,000 pts + $57.19 | 2 stops | United Airlines (UA) | 9+ | 11 | See dates | |
| Delta SkyMiles | 380,000 pts + $74.29 | 2 stops | Delta Air Lines (DL), KLM (KL) | 5 | 18 | See dates |
Not seen in first class: American Airlines AAdvantage, Air Canada Aeroplan, Avianca LifeMiles, GOL Smiles, Air France/KLM Flying Blue, Lufthansa Miles & More, Qantas Frequent Flyer and Virgin Atlantic Flying Club.
Not seen means AwardTool hasn't observed this cabin on this route in the last 30 days. It doesn't mean the airline has no seats. Dates seen counts departure dates with an open award in that cabin at any price; newest observation is the latest time AwardTool saw one of them. Seats is the count the program reported when we observed it; some programs report at most 9.
Observed first-class award examples
| Departure | Program | Points + taxes | Seats | Stops | Observed (UTC) | |
|---|---|---|---|---|---|---|
| United MileagePlus | 301,600 pts + $57.19 | 6 | 2 stops | Check this date | ||
| United MileagePlus | 395,000 pts + $63.23 | 1 | 2 stops | Check this date | ||
| Delta SkyMiles | 495,000 pts + $59.70 | 8 | 2 stops | Check this date |
Prices are one-way per traveler: the program's points or miles plus taxes and carrier fees in USD, as AwardTool observed them in the observation window. Award space changes constantly. A seat we saw may be gone, and space we haven't seen may exist. Always confirm with a live search before transferring points; most transfers can't be reversed.
How often first-class award space showed up
Departure dates in the next 365 days that AwardTool checked for each program in the last 30 days, how many had first-class award space at any price, and the latest departure with space.
| Program | Dates with space | Share of dates checked | Latest departure with space |
|---|---|---|---|
| United MileagePlus | 11 of 26 | 42% | |
| Delta SkyMiles | 18 of 21 | 85% |
Best months for first class from Porto (OPO) to Houston (IAH)
| Month | Lowest observed | Program | Dates |
|---|---|---|---|
| 395,000 pts + taxes vary | United MileagePlus | 1 | |
| 301,600 pts + taxes vary | United MileagePlus | 1 | |
| 200,000 pts + taxes vary | United MileagePlus | 4 | |
| 415,000 pts + taxes vary | Delta SkyMiles | 3 | |
| 300,900 pts + taxes vary | United MileagePlus | 5 |
Lowest first class award by month and program
Each program's lowest one-way first-class award by departure month, in its own points or miles; taxes vary. — means the program showed no first-class space that month.
| Program | |||||
|---|---|---|---|---|---|
| United MileagePlusmiles | 395,000 | 301,600 | 200,000 | — | 300,900 |
| Delta SkyMilesmiles | — | 495,000 | 380,000 | 415,000 | 495,000 |
Airlines seen in first class
Airlines that appeared on the award itineraries AwardTool observed, and the programs that showed them.
- Delta Air Lines (DL): Delta SkyMiles
- KLM (KL): Delta SkyMiles
- United Airlines (UA): United MileagePlus
First class on nearby routes
The lowest first-class award AwardTool observed on related routes, as each route's page shows it: the return direction, other airports in the same cities, and more routes from Porto (OPO) and to Houston (IAH). One way, in the program's points or miles; taxes are on each route's page.
| Route | Lowest observed | Program | Dates seen |
|---|---|---|---|
| Houston (IAH) to Porto (OPO)Return direction | 200,000 miles | United MileagePlus | 20 |
| Porto (OPO) to San Francisco (SFO)Also from OPO | 200,000 miles | United MileagePlus | 114 |
| Porto (OPO) to Los Angeles (LAX)Also from OPO | 200,000 miles | United MileagePlus | 87 |
| Porto (OPO) to Philadelphia (PHL)Also from OPO | 278,100 miles | United MileagePlus | 55 |
| Porto (OPO) to Miami (MIA)Also from OPO | 200,000 miles | United MileagePlus | 62 |
| Salt Lake City (SLC) to Houston (IAH)Also to IAH | 20,000 points | Alaska Atmos Rewards | 325 |
| Los Angeles (LAX) to Houston (IAH)Also to IAH | 15,000 pointsNonstop | Alaska Atmos Rewards | 322 |
| Seattle (SEA) to Houston (IAH)Also to IAH | 25,000 pointsNonstop | Alaska Atmos Rewards | 326 |
Points that transfer to these programs
| Program | Amex | Bilt | Capital One | Chase | Citi | Wells Fargo |
|---|---|---|---|---|---|---|
| Delta SkyMiles | 1:1 · Instant | — | — | — | — | — |
| United MileagePlus | — | 1:1 · Instant | — | 1:1 · Instant | — | — |
Check current transfer bonuses. Most transfers can't be reversed.
Questions about first-class award flights from Porto (OPO) to Houston (IAH)
What's the lowest first-class award from Porto (OPO) to Houston (IAH)?
200,000 miles + $57.19 with United MileagePlus. United MileagePlus showed first-class award space on 11 departure dates at any price (newest observation Oct 13, 2026, 16:14 UTC). Search live before transferring points.
Which programs had first-class award space from Porto (OPO) to Houston (IAH)?
United MileagePlus (11 dates) and Delta SkyMiles (18 dates), in the last 30 days.
Is there nonstop first-class award space from Porto (OPO) to Houston (IAH)?
AwardTool hasn't observed nonstop first-class award space on this route in the last 30 days. That doesn't mean nonstop space never appears.
Which months had the lowest first-class award prices from Porto (OPO) to Houston (IAH)?
Counting only month prices from programs with award space on 2 or more dates that month, and leaving out unusually low outliers, the lowest first-class award AwardTool observed was for Mar 2027 departures: 200,000 miles with MileagePlus (4 dates). The month table shows every lowest price, including those. Based on dates we observed, not a forecast.