Bus 175orPrivate transfer to Modlin Airport from Chopin?

The short answer

These do not go to the same place, so price is not the comparison. The Bus 175 reaches Śródmieście: Warszawa Centralna and Warszawa Śródmieście stations, and the Centrum junction on Marszałkowska; the Private transfer to Modlin Airport from Chopin does not. The other airport, not the city. A door-to-door transfer between the two airports.

The Bus 175 is quicker: 28 min against 1 h.

Bus 175: 04:58–23:58. Private transfer to Modlin Airport from Chopin: hours not recorded.

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. The Private transfer to Modlin Airport from Chopin is charged in euros; its column is converted at the reference rate in its fare note.
Travelers	Bus 175	Private transfer to Modlin Airport from Chopin	Difference
1	PLN 4.40	from PLN 339	up to PLN 334.60
2	PLN 8.80	from PLN 339	up to PLN 330.20
3	PLN 13.20	from PLN 339	up to PLN 325.80
4	PLN 17.60	from PLN 339	up to PLN 321.40
5	PLN 22	from PLN 678	up to PLN 656
6	PLN 26.40	from PLN 678	up to PLN 651.60
7	PLN 30.80	from PLN 678	up to PLN 647.20
8	PLN 35.20	from PLN 678	up to PLN 642.80

Side by side

Where each one leaves you

175 · Warszawski Transport Publiczny (ZTM)Bus 175

From: Stop "Lotnisko Chopina – Przyloty 02" on the lower, arrivals level of the terminal
To: Dw. Centralny in 22 to 28 minutes and Centrum in 24 to 31, then Nowy Świat and Krakowskie Przedmieście to Pl. Piłsudskiego at the edge of the Old Town in 32 to 43
Luggage: Free and unlimited by the tariff; a city bus with no hold.
Runs: 04:58–23:58
Journey: 22–43 min

Board on the arrivals level. WTP states that boarding buses on the upper, departures level to leave the airport is not allowed.

The airport itself allows about 30 minutes to Centrum, and the weekday peak runs to 43 minutes to Pl. Piłsudskiego. The train is faster to both stations.

From 23:03 every 175 terminates at Centrum; the last one to Pl. Piłsudskiego leaves at 22:53.

At weekends the last stretch runs by Marszałkowska, Królewska and Zachęta instead of Nowy Świat and Krakowskie Przedmieście; the terminus is the same.

The on-board ticket machine takes cards only.

Bus 175: price for every party size

WTP's airport page

transfer · KiwitaxiPrivate transfer to Modlin Airport from Chopin

From: Driver meets you in arrivals with a name board
To: Modlin Airport, the terminal you name when you book
Luggage: Choose the vehicle by luggage as well as seats; the sedan seats four, the minibus seven.
Journey: 60 min

Book at least 16 hours ahead; nearer the day a car is offered only when one is free.

The price is fixed when you book, not by the meter.

Private transfer to Modlin Airport from Chopin: price for every party size

Book transfer through Kiwitaxi

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This compares two of 7 options. See all of them ranked for your party size

Bus 175orPrivate transfer to Modlin Airport from Chopin?

Priced against each other

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The other comparisons at Chopin Airport