Basel to Porto BSL, MLH → OPO
EuroAirport Swiss (BSL), EuroAirport Basel-Mulhouse-Freiburg (MLH) → Porto Airport (OPO)
The cheapest return found recently is $213 with easyJet, 31 Dec – 3 Jan 2027, found yesterday. The cheapest one-way found recently is $34 with easyJet, 31 Dec, found yesterday.
Return
The cheapest return fare on each of 6 departure dates is usually $227 to $360.
Cheapest return found recently
$213
31 Dec – 3 Jan 2027 · easyJet
EuroAirport Swiss (BSL) → Porto Airport (OPO)
Leaves 9:05 p.m. · Return leaves 9:55 p.m. · 16 h 35 min of travel, both ways together
out nonstop, back 1 stop
found yesterday
Cheapest nonstop return
$375
23 Dec – 1 Jan 2027 · easyJet
EuroAirport Swiss (BSL) → Porto Airport (OPO)
Leaves 5:10 p.m. · Return leaves 8:40 a.m. · 5 h 5 min of travel, both ways together
out nonstop, back nonstop
found 6 days ago
Found recently, and the cheapest we hold
$213 31 Dec – 3 Jan 2027found yesterdaySee prices for these dates
$210 13 Nov – 17 Novfound 4 days agoSee prices for these dates
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $126 to $268.
25 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 6 departure dates from 13 Nov to 1 Jan 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 3-night return fares leaving within 3 days of 31 Dec to compare.
Every date we hold
9 fares on 6 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 13 Nov – 17 Nov | $210 | Lufthansa | EuroAirport Swiss (BSL) → Porto Airport (OPO) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 18 Dec – 27 Dec | $319 | easyJet | EuroAirport Swiss (BSL) → Porto Airport (OPO) | out 2 stops, back nonstop | found 4 days ago | See prices for these dates |
| 23 Dec – 1 Jan 2027 | $375 | easyJet | EuroAirport Swiss (BSL) → Porto Airport (OPO) | out nonstop, back nonstop | found 6 days ago | See prices for these dates |
| 27 Dec – 2 Jan 2027 | $373 | Chair Airlines | EuroAirport Swiss (BSL) → Porto Airport (OPO) | out nonstop, back 1 stop | found yesterday | See prices for these dates |
| 31 Dec – 3 Jan 2027 | $213 | easyJet | EuroAirport Swiss (BSL) → Porto Airport (OPO) | out nonstop, back 1 stop | found yesterday | See prices for these dates |
| 1 Jan 2027 – 1 Jan 2027 | $268 | easyJet | EuroAirport Swiss (BSL) → Porto Airport (OPO) | out nonstop, back 2 stops | found 6 days ago | See prices for these dates |
Which month looks cheapest?
November 2026 is the cheapest month — from $210.
Airlines on the cheapest dates: easyJet, Lufthansa, Chair Airlines, easyJet.
One-way
The cheapest one-way fare on each of 3 departure dates is usually $57 to $105.
Cheapest one-way found recently
$34
31 Dec · easyJet
EuroAirport Swiss (BSL) → Porto Airport (OPO)
Leaves 9:05 p.m. · 2 h 40 min trip
nonstop
found yesterday
Cheapest nonstop one-way
$34
31 Dec · easyJet
EuroAirport Swiss (BSL) → Porto Airport (OPO)
Leaves 9:05 p.m. · 2 h 40 min trip
nonstop
found yesterday
Found recently, and the cheapest we hold
$34 31 Decfound yesterdayOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 20 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $25 to $181.
20 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 3 departure dates from 26 Oct to 31 Dec, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 31 Dec to compare.
Every date we hold
3 fares on 3 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 26 Oct | $79 | easyJet | EuroAirport Swiss (BSL) → Porto Airport (OPO) | stops unknown | found yesterday | Open this trip |
| 23 Dec | $131 | easyJet | EuroAirport Swiss (BSL) → Porto Airport (OPO) | 1 stop | found yesterday | Open this trip |
| 31 Dec | $34 | easyJet | EuroAirport Swiss (BSL) → Porto Airport (OPO) | nonstop | found yesterday | Open this trip |
Which month looks cheapest?
December 2026 is the cheapest month — from $34.
Airlines on the cheapest dates: easyJet, easyJet.
Premium cabin fares from Basel to Porto
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 31 Dec – 3 Jan 2027 in another cabin: Premium economy · Business · First
Today's prices for 31 Dec in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Basel to Porto?
Return
Fares 30 to 59 days before departure were typically 59% lower than 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 18 Oct (25 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $321 | $295 | +141% | 12 |
| 14–29 days | $171 | $133 | +29% | 12 |
| 30–59 days | $133 | $126 | Cheapest seen | 14 |
| 60–89 days | $264 | $213 | +99% | 25 |
One-way
Not enough history yet: in 20 days of one-way prices, 24 Sept to 18 Oct, fewer than 3 booking ranges had prices on 7 days or more.
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Strasbourg → Porto
115 km from Basel
$237
$24 more than flying from Basel
31 Dec – 3 Jan 2027 · SXB → OPO · out 1 stop, back 1 stop
found yesterday
Zurich → Porto
75 km from Basel
$337
$124 more than flying from Basel
27 Dec – 3 Jan 2027 · ZRH → OPO · out nonstop, back 2 stops
found today
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Strasbourg → Porto
115 km from Basel
$40
$6 more than flying from Basel
14 Nov · SXB → OPO · nonstop
found today
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 31 Dec – 3 Jan 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work