Bus 210orPKM train and SKM, via Wrzeszcz?

The short answer

For one traveler the Bus 210 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 38 min. The Bus 210 varies between 33 and 40 minutes.

Bus 210: 04:50–23:05. PKM train and SKM, via Wrzeszcz: 04:25–23:32.

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	Bus 210	PKM train and SKM, via Wrzeszcz	Difference
1	PLN 4.80	PLN 8.50	PLN 3.70
2	PLN 9.60	PLN 17	PLN 7.40
3	PLN 14.40	PLN 25.50	PLN 11.10
4	PLN 19.20	PLN 34	PLN 14.80
5	PLN 24	PLN 42.50	PLN 18.50
6	PLN 28.80	PLN 51	PLN 22.20
7	PLN 33.60	PLN 59.50	PLN 25.90
8	PLN 38.40	PLN 68	PLN 29.60

Where each one leaves you

210 · ZTM GdańskBus 210

From: Stop Port Lotniczy, opposite the terminal next to car park P1
To: Dworzec Główny, beside Gdańsk Główny station, in 33 to 40 minutes, via Hucisko at the edge of the Old Town
Luggage: A city bus with no hold; luggage rides free.
Runs: 04:50–23:05
Journey: 33–40 min

Hourly on Saturday and Sunday: miss the :44 and the next one is an hour away.

The PLN 4.80 ticket is for this bus only. If you change to a tram, buy the PLN 6 75-minute ticket instead.

Bus 110 from the same stops goes only to Wrzeszcz station, not to the centre.

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.