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Round trips to Lisbon
| From | Typical low fare | Cheapest month |
|---|---|---|
| London | $119 | Nov 2026: $75 |
| Vancouver | $545 | Jan 2027: $545 |
| Toronto | $565 | Jan 2027: $422 |
| Dubai | $600 | Nov 2026: $519 |
| San Francisco | $720 | Feb 2027: $690 |
| New York | $722 | Nov 2026: $399 |
| Hong Kong | $806 | Dec 2026: $806 |
| Chicago | $810 | Apr 2027: $803 |
| Los Angeles | $835 | Apr 2027: $677 |
| Singapore | $885 | Jan 2027: $824 |
| Sydney | $1,253 | Oct 2026: $1,253 |
Round trips to Porto
| From | Typical low fare | Cheapest month |
|---|---|---|
| London | $172 | Nov 2026: $78 |
| New York | $529 | Nov 2026: $529 |
| Toronto | $685 | Nov 2026: $685 |
| Dubai | $729 | Nov 2026: $482 |
| Chicago | $1,006 | Jun 2027: $1,006 |
How these numbers work: for each month we take the five cheapest round trips found in recent Aviasales searches and show the middle one, per person, in US dollars. They're a guide to what's realistic, not a quote. Seats at that price can sell out, and bags may cost extra. Updated 2026-10-08.