Cheap flights from Denver to Warsaw

April is the cheapest month on this route, and the price calendar covers September through January and again from April to July, so the autumn and early spring windows are where the value usually sits. Summer is peak season in both directions, with school holidays and the busiest tourist months in Poland pushing fares up. Midweek departures generally cost less than Friday or Sunday flights. Thanksgiving and the Christmas and New Year stretch are the expensive periods on the US side, while Easter and the early May holidays fill planes heading to Poland. Book a few months ahead for summer and use the calendar to find the quieter weeks.

None of the airlines on this route fly nonstop from Denver to Warsaw, so you are choosing between connections. United, Delta, American, Air Canada, Lufthansa, British Airways, Air France, Aer Lingus, Icelandair and JetBlue all appear on the route, routing you through their own hubs. The big network carriers bundle a checked bag and meals into most long-haul fares, while the leaner and low-cost options charge separately for bags, seat selection and food, so the headline fare is rarely the final number. Where two itineraries look similar, compare what is actually included and how long the layover is.

Warsaw has two airports: F. Chopin, the main one, sits close to the city and is the quickest to reach by train, bus or taxi, while Modlin lies well to the north of the capital and needs a longer transfer, usually by dedicated coach or bus. Check which airport your ticket actually uses before you book, because a Modlin arrival adds real time to the journey into town. Late-night arrivals can mean fewer public transport options, so plan the last leg in advance. If you are connecting onward, allow generous time between flights.

Currency

PLZ (zł)

Power sockets

Type C, E · 230 V

Language

Polish

Emergency number

112, 986, 997

Driving side

right

Calling code

+48

Internet domain

.pl

EU / Schengen

EU member, Schengen area

Population of Warsaw

1.9 M (2024)

Time zone

UTC+01 (Europe/Warsaw)

Country facts: Wikidata

• Confirm which Warsaw airport your itinerary lands at, since F. Chopin and Modlin are far apart.
• Check the baggage allowance on the fare you are booking, especially on the leaner carriers where a checked bag costs extra.
• If the itinerary is split across two tickets, leave a long buffer at the connection in case of a delay.
• Make sure your passport is valid for the whole trip and check the current entry rules for Poland before you book.
• Compare total journey time and layover length, not just the fare, since every option here connects.
• Book early for summer and around the Easter and Christmas periods, when seats fill fastest.