Roundtrip
Holiday
🇵🇹Porto
Portugal
City
Sep 24ThuOct 2Fri
8 nights19°
Roundtrip fare
฿31,238
Steal
฿45,047-31%฿13,809 below avg
Air FranceCheapest Time to Fly to Porto
Compare the cheapest months to fly from Bangkok to Porto in THB. See separate one-way and roundtrip fare ranges, sample sizes and current deals.
One way from ฿19,666
Roundtrip from ฿31,238
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Current deals to Porto · Roundtrip
Outbound and return flights together in one total fare · Available fares behind the monthly comparison
Air FranceRoundtrip
Last Minute
🇵🇹Porto
Portugal
City
Sep 13SunSep 22Tue
9 nights19°
Roundtrip fare
฿31,297
Steal
฿45,047-31%฿13,750 below avg
OUTAir France
1 stopAir FranceRET
KLM
1 stopKLMRoundtrip
🇵🇹Porto
Portugal
City
Nov 23MonNov 30Mon
7 nights12°
Roundtrip fare
฿32,160
Steal
฿45,047-29%฿12,887 below avg
SWISSCurrent deals to Porto · One way
Outbound-only fares for flexible and open-ended plans · Available fares behind the monthly comparison
One way
Porto
Portugal
City
Oct 22Thu
One-way fare
฿19,666
Steal
฿25,906-24%฿6,240 below avg
Turkish AirlinesOne way
Last Minute
Porto
Portugal
City
Sep 21Mon
One-way fare
฿20,074
Steal
฿25,906-23%฿5,832 below avg
Turkish AirlinesOne way
Last Minute
Porto
Portugal
City
Sep 22Tue
One-way fare
฿20,074
Steal
฿25,906-23%฿5,832 below avg
Turkish AirlinesOne way
Porto
Portugal
City
Sep 28Mon
One-way fare
฿20,074
Steal
฿25,906-23%฿5,832 below avg
Turkish AirlinesOne way
Porto
Portugal
City
Oct 8Thu
One-way fare
฿20,074
Steal
฿25,906-23%฿5,832 below avg
Turkish AirlinesMonthly fare comparison
Lowest and average fares with sample sizes.
Monthly fare comparison
Lowest and average fares with sample sizes.
January 2027
254 fares
One way29
- Min
- ฿20,455
- Avg
- ฿29,135
Roundtrip225
- Min
- ฿37,300
- Avg
- ฿44,993
February 2027
432 fares
One way28
- Min
- ฿21,494
- Avg
- ฿24,672
Roundtrip404
- Min
- ฿36,351
- Avg
- ฿43,919
March 2027
203 fares
One way27
- Min
- ฿21,130
- Avg
- ฿27,787
Roundtrip176
- Min
- ฿37,091
- Avg
- ฿46,473
September 2026
205 fares
One way21
- Min
- ฿20,074
- Avg
- ฿25,572
Roundtrip184
- Min
- ฿31,238
- Avg
- ฿44,811
October 2026
408 fares
One way31
- Min
- ฿19,666
- Avg
- ฿23,642
Roundtrip377
- Min
- ฿34,891
- Avg
- ฿45,256
November 2026
413 fares
One way30
- Min
- ฿20,146
- Avg
- ฿24,167
Roundtrip383
- Min
- ฿32,160
- Avg
- ฿45,247
December 2026
114 fares
One way31
- Min
- ฿20,404
- Avg
- ฿26,533
Roundtrip83
- Min
- ฿39,557
- Avg
- ฿46,308
How to read the monthly fare data
- Compare one-way prices only with the one-way series and roundtrip prices only with the roundtrip series.
- Use the fare count to judge how much current evidence sits behind a monthly average.
- Treat the lowest fare as an observed option, not a guaranteed future price.
- Open a month to compare exact departure dates, airlines, stops and travel time.
FAQ: Cheapest Time to Fly to Porto
Which month has the cheapest one-way flights from Bangkok to Porto?
September currently has the lowest observed one-way fare, from ฿19,666. This compares one-way fares only.
Which month has the cheapest roundtrip flights from Bangkok to Porto?
September currently has the lowest observed roundtrip fare, from ฿31,238. This compares complete roundtrips only.
How are the cheapest months for Porto calculated?
We compare current observed fares from Bangkok by departure month. One-way and roundtrip prices stay in separate series, and each monthly table shows its available fare count.
Does the cheapest month guarantee the same price later?
No. It identifies the lowest fare in the current dataset, not a future price guarantee. Confirm the final itinerary total, airports, baggage and availability before booking.
Quick Answers
Which month is cheapest one way?
September currently starts at ฿19,666, the lowest observed one-way fare among the available months.
Which month is cheapest roundtrip?
September currently starts at ฿31,238, the lowest observed complete-roundtrip fare.
What does this comparison include?
Each month shows the lowest and average observed itinerary total plus the number of available fares in that series.
Can one-way and roundtrip prices be compared?
No. They represent different products, so this page keeps their prices, averages and sample sizes separate.