Seattle to Warsaw BFI, SEA → WAW, WMI
Boeing Field International Airport (BFI), Seattle-Tacoma International Airport (SEA) → Frederic Chopin Airport (WAW), Warsaw-Modlin Airport (WMI)
The cheapest return found recently is $1,485 with American Airlines, 19 Dec – 8 Jan 2027, found 4 days ago. The cheapest one-way found recently is $361 with Icelandair, 10 Dec, found yesterday.
Return
The cheapest return fare on each of 3 departure dates is usually $724 to $1,128.
Cheapest return found recently
$1,485
19 Dec – 8 Jan 2027 · American Airlines
Seattle-Tacoma International Airport (SEA) → Frederic Chopin Airport (WAW)
Leaves 11:59 p.m. · Return leaves 11:00 a.m. · 47 h 54 min of travel, both ways together
out 2 stops, back 2 stops
found 4 days ago
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$1,485 19 Dec – 8 Jan 2027found 4 days agoSee prices for these dates
$676 25 Oct – 12 Novfound 6 days agoSee prices for these dates
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $611 to $915.
At $1,485, the cheapest return found recently is above that range.
25 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 3 departure dates from 25 Oct to 19 Dec, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 20-night return fares leaving within 3 days of 19 Dec to compare.
Every date we hold
5 fares on 3 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 25 Oct – 12 Nov | $676 | Icelandair | Seattle-Tacoma International Airport (SEA) → Warsaw-Modlin Airport (WMI) | out 2 stops, back 2 stops | found 6 days ago | See prices for these dates |
| 26 Oct – 13 Nov | $771 | Turkish Airlines | Seattle-Tacoma International Airport (SEA) → Frederic Chopin Airport (WAW) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 19 Dec – 8 Jan 2027 | $1,485 | American Airlines | Seattle-Tacoma International Airport (SEA) → Frederic Chopin Airport (WAW) | out 2 stops, back 2 stops | found 4 days ago | See prices for these dates |
Which month looks cheapest?
October 2026 is the cheapest month — from $676.
Airlines on the cheapest dates: Icelandair, Turkish Airlines, American Airlines.
One-way
The cheapest one-way fare on each of 3 departure dates is usually $535 to $766.
Cheapest one-way found recently
$361
10 Dec · Icelandair
Seattle-Tacoma International Airport (SEA) → Warsaw-Modlin Airport (WMI)
Leaves 2:35 p.m. · 25 h trip
2 stops
found yesterday
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$361 10 Decfound yesterdayOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 15 days, 26 Sept to 18 Oct, the cheapest one-way we saw each day was $239 to $823.
15 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 3 departure dates from 10 Dec to 21 Dec, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 10 Dec to compare.
Every date we hold
4 fares on 3 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 10 Dec | $361 | Icelandair | Seattle-Tacoma International Airport (SEA) → Warsaw-Modlin Airport (WMI) | 2 stops | found yesterday | Open this trip |
| 20 Dec | $823 | Alaska Airlines | Seattle-Tacoma International Airport (SEA) → Warsaw-Modlin Airport (WMI) | 3 stops | found 5 days ago | Open this trip |
| 21 Dec | $709 | SeaPort Airlines | Boeing Field International Airport (BFI) → Warsaw-Modlin Airport (WMI) | 3 stops | found 5 days ago | Open this trip |
Airlines on the cheapest dates: Icelandair, Alaska Airlines, SeaPort Airlines.
Premium cabin fares from Seattle to Warsaw
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 19 Dec – 8 Jan 2027 in another cabin: Premium economy · Business · First
Today's prices for 10 Dec in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Seattle to Warsaw?
Return
Fares 90 to 179 days before departure were typically 16% lower than 7 to 13 days before departure.
From the cheapest return each day between 24 Sept and 18 Oct (25 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 7–13 days | $729 | $676 | +19% | 12 |
| 60–89 days | $931 | $915 | +52% | 10 |
| 90–179 days | $611 | $611 | Cheapest seen | 7 |
One-way
Fares 30 to 59 days before departure were typically 28% lower than 14 to 29 days before departure.
From the cheapest one-way each day between 26 Sept and 18 Oct (15 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 14–29 days | $395 | $256 | +38% | 10 |
| 30–59 days | $286 | $239 | Cheapest seen | 9 |
| 60–89 days | $336 | $310 | +18% | 13 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
One-way
Everett → Warsaw
34 km from Seattle
$1,044
$683 more than flying from Seattle
10 Dec · PAE → WAW · 1 stop
found yesterday
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 19 Dec – 8 Jan 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work