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ul. Mangalia 1, Warsaw, 02-758 (show map)
Hotel Overview
Formerly o3Hotel dawny Start Hotel Atos
Before June 2022 o3Hotel was known as o3Hotel dawny Start Hotel Atos
Before May 2021 o3Hotel was known as Start Hotel Atos

Lock in a great price now and relax with our Price Guardian working for you
Hotel prices fluctuate. Book now, we will check prices each day for you and then let you know how to re-book if an even better price becomes available.Rooms List
Setup a Price Alert for o3Hotel
Each day we'll check prices and send you an email for your selected dates at o3Hotel. If you don't have specific dates but would like to check prices for say next weekend or say next month we can check the price too.
When the hotel goes on sale you will know straight away from the daily email and be able to book with confidence that you've got excellent value.
Facilities of o3Hotel
General
Parking, Pets allowed, WiFi everywhere
Services
Free WiFi, Internet services, WiFi
Food & Drink
Bar, Packed lunches, Restaurant, Room service, Special diet menus (on request)
Pools and wellness
Fitness centre
Front-desk/reception area services
24-hour front desk, ATM/cash machine on site, Luggage storage, Private check-in/check-out, Safety deposit box
Cleaning services
Daily maid service, Dry cleaning
Business facilities
Fax/photocopying, Meeting/banquet facilities
Miscellaneous
Air conditioning, Designated smoking area, Facilities for disabled guests, Family rooms, Heating, Lift, Non-smoking rooms, Non-smoking throughout
Room facilities [ These may vary room to room ]
Air Conditioning, Bathroom, Clothes rack, Desk, Flat-screen TV, Hairdryer, Heating, Hypoallergenic, Linen, Satellite Channels, Shower, Tea/Coffee Maker, Toilet, Towels, TV, Wake-up service, Wardrobe/Closet
Hotel Policies
Check-In
From 15:00:00 hours
Check-Out
-12:00:00 hours
Cancellation / Prepayment
Cancellation, prepayment and 'book now pay later' policies vary according to room type. Please check the room conditions when selecting your room above.
Accepted credit cards
The hotel reserves the right to pre-authorise credit cards prior to arrival.
The fine print
The hotel is fully accessible for wheelchairs. Wheelchair accessible hotel room (with adequate bathroom) is available.We replaced the single use plastic water bottles in the rooms with a water corner. We invite you to fill up your multiple use bottle with your favourite water here. If you do not have a re-usable bottle yet, please visit the Reception desk to buy one (12 PLN) or our team can provide you with free of charge water in standard disposable bottles.Please note that children that accompanied by adults need to provide a valid {ID/government-issued ID/passport/student ID} and identify his/her relationship with the adults at check-in.If you require an invoice when booking a prepaid rate, please write this request and your company details in the Ask a question box.
When staying at the property with children, please note that the property is legally obliged to apply standards for the protection of minors, to determine the identity of the minors and their relationship with the adult with whom they are staying.
Traveller reviews

“Superb”
20 Jul 2025
Clean, cozy, option for a one night stay is great.

“A clean, comfortable two-night base that met all my needs while I explored Warsaw.”
12 Jul 2025
What I appreciated the most was the location. It’s a perfect base for exploring the city or for a short business stay. The hotel itself is quite simple in terms of standard, but it has everything you need for a comfortable visit. I needed an iron — they provided it. I asked for a plaster — they gave me one right away. For a short stay, whether for business or sightseeing in Warsaw, it’s a great spot. Very well located, with easy access to different areas and excellent taxi and transport connections. The hotel is nicely designed — nothing luxurious, but clean, pleasant, and straightforward. The rooms are spacious, and the staff is friendly and helpful.

“Superb”
10 Jul 2025
We loved it. The breakfast was good for money. The room was very clean.

“price vs quality does not match”
24 Jun 2025
We stayed for one night, the room was clean, had 4 beds, breakfast was good