San Francisco→Porto
SFO–OPO
The lowest price recorded on this route.
USD 609
↔ round trip
How we know this
The comparison comes from prices recorded on this exact route on 5 different departure dates we sampled in the last six weeks.
total
63
echo
21/40
1 independent mention
freshness
27/30
last echoed 3h ago
value
15/30
no price history yet
How we rank the board. It isn't advice — the sentence at the top of the page is.