PKM train and SKM, via WrzeszczorNight bus N3?

The short answer

For one traveler the Night bus N3 is cheaper by PLN 3.70. That does not change up to 8 travelers.

The PKM train and SKM, via Wrzeszcz is quicker: 29 min against 37 min. The Night bus N3 varies between 37 and 46 minutes.

PKM train and SKM, via Wrzeszcz: 04:25–23:32. Night bus N3: 23:16–04:07.

Priced against each other

Whole-party totals · adult fares

What each costs for the whole party, in PLN. The cheaper of the two is marked on every row.
Travelers	PKM train and SKM, via Wrzeszcz	Night bus N3	Difference
1	PLN 8.50	PLN 4.80	PLN 3.70
2	PLN 17	PLN 9.60	PLN 7.40
3	PLN 25.50	PLN 14.40	PLN 11.10
4	PLN 34	PLN 19.20	PLN 14.80
5	PLN 42.50	PLN 24	PLN 18.50
6	PLN 51	PLN 28.80	PLN 22.20
7	PLN 59.50	PLN 33.60	PLN 25.90
8	PLN 68	PLN 38.40	PLN 29.60

Where each one leaves you

PKMSKM · POLREGIO on the PKM line, then PKP SKMPKM train and SKM, via Wrzeszcz

From: Gdańsk Port Lotniczy station, directly in front of the terminal
To: Gdańsk Główny, after a change at Gdańsk Wrzeszcz: 21 to 23 minutes on the airport train, then 7 on the SKM
Luggage: Luggage rides free on a Taryfa Pomorska ticket.
Runs: 04:25–23:32
Journey: 28–30 min

At Wrzeszcz, the SKM to the centre leaves from platform 3.

The 04:25 and the :28 train in every even hour from 06:28 to 20:28 run through to Gdańsk Główny without a change, in 31 to 36 minutes.

The bus ticket and the metropolitan 1-ride and 75-minute tickets are not valid on the train.

Late in the evening the SKM thins out: the 22:54 reaches Wrzeszcz at 23:15 and the next SKM south is 23:40.

At weekends the SKM drops to about every 30 minutes, a third of its weekday frequency; the ride is still 7 minutes to Gdańsk Główny.

N3 · ZTM GdańskNight bus N3

From: Stop Port Lotniczy, opposite the terminal, the same stops as bus 210
To: Dworzec Główny, beside Gdańsk Główny station, through Kokoszki and Siedlce
Luggage: A city bus with no hold; luggage rides free.
Runs: 23:16–04:07
Journey: 37–46 min

Hourly: landing at 01:20 means waiting for the 02:16.