SEA - MAD

$255 Find Cheap Flights from Seattle to Madrid

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Madrid departing on 8/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Madrid

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Madrid.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Madrid.
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41.299.237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$484
Typical prices: $615-$902
Multiple Airlines
Mon 3/9Mon 3/16
SEA - MAD • 1 stop
Cheapest one-way
$255
Typical prices: $442-$668
Air Canada
Mon 8/10
SEA - MAD • 2 stops
Video guide: How to find cheap flights to Madrid
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Top airlines
United Airlines
Cheapest • from $486 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 16% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 39% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Madrid (SEA-MAD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Madrid that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Madrid

Mon, Mar 9 - Mon, Mar 16
Multiple Airlines Logo
3:10 pm - 5:40 pm
SEA
-
MAD
18h 30m
1 stop
Multiple Airlines Logo
8:30 pm - 12:35 pm
MAD
-
SEA
24h 05m
1 stop
$484Multiple Airlines
Tue, Apr 7 - Wed, Apr 15
United Airlines Logo
7:00 am - 8:05 am
SEA
-
MAD
40h 05m
2 stops
United Airlines Logo
12:45 pm - 7:00 pm
MAD
-
SEA
39h 15m
2 stops
$486United Airlines
Wed, Apr 8 - Wed, Apr 15
United Airlines Logo
5:00 am - 7:50 pm
SEA
-
MAD
29h 50m
2 stops
United Airlines Logo
12:45 pm - 10:37 pm
MAD
-
SEA
42h 52m
2 stops
$491United Airlines
Wed, Mar 11 - Wed, Mar 18
United Airlines Logo
10:55 am - 8:15 pm
SEA
-
MAD
25h 20m
2 stops
United Airlines Logo
12:40 pm - 10:45 pm
MAD
-
SEA
42h 05m
2 stops
$492United Airlines
Sun, Apr 12 - Wed, Apr 22
Delta Logo
6:40 pm - 9:10 am
SEA
-
MAD
29h 30m
1 stop
Delta Logo
2:35 pm - 10:31 pm
MAD
-
SEA
16h 56m
1 stop
$493Delta
Sat, Apr 11 - Tue, Apr 21
British Airways Logo
12:34 pm - 9:35 am
SEA
-
MAD
36h 01m
1 stop
British Airways Logo
1:35 pm - 12:30 am
MAD
-
SEA
19h 55m
1 stop
$494British Airways
Mon, Mar 9 - Mon, Mar 16
United Airlines Logo
11:59 pm - 7:00 am
SEA
-
MAD
23h 01m
2 stops
United Airlines Logo
1:45 pm - 11:49 am
MAD
-
SEA
30h 04m
2 stops
$495United Airlines
Tue, Mar 10 - Tue, Mar 17
United Airlines Logo
7:00 am - 9:15 am
SEA
-
MAD
18h 15m
2 stops
United Airlines Logo
11:15 am - 10:45 pm
MAD
-
SEA
19h 30m
2 stops
$496United Airlines
Sun, Apr 12 - Wed, Apr 22
Delta Logo
6:40 pm - 9:10 am
SEA
-
MAD
29h 30m
1 stop
Delta Logo
2:35 pm - 10:00 am
MAD
-
SEA
28h 25m
2 stops
$497Delta
Tue, Mar 10 - Thu, Mar 19
Delta Logo
7:15 am - 11:30 am
SEA
-
MAD
20h 15m
2 stops
Delta Logo
11:00 am - 10:15 pm
MAD
-
SEA
19h 15m
2 stops
$499Delta
Booking Insights

KAYAK's insights & trends for Seattle to Madrid flights

Get data-powered insights and trends into flights from Seattle to Madrid to help you find the cheapest flights, the best time to fly and much more.

Find cheap flights to Madrid
Find cheap flights to Madrid

Planning a trip from Seattle to Madrid? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

How much is a round-trip flight from Seattle to Madrid?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to Madrid departing in March.

What is the cheapest month to fly from Seattle to Madrid?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Madrid, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Madrid is January, where tickets cost $492 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,141 and $1,133 respectively.

How far in advance should I book a flight from Seattle to Madrid?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Madrid, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Seattle to Madrid, you should book around 3 weeks before departure, which saves you about 16% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$255
Best time to beat the crowds with an average 39% drop in price.
Most popular time to fly and prices are also 13% lower on average.
Flight from Seattle to Madrid

When to book flights from Seattle to Madrid

Are your dates flexible? Find out the best times to travel from Seattle to Madrid based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Madrid

  • Does MAD provide medical services to its travelers?

    Yes. The airport has three medical centers in the Arrival Halls of T4 and T2 and Terminal T4 Satellite. There are also 75 Heart Rescue Areas you can visit in case of a heart attack. Four pharmacies are also available Terminal T4, T1, and T2.

  • Can I access financial and communication services at MAD?

    Yes. There are multiple banks in each terminal at the airport and you can find ATMs in the public arrivals lounge in each terminal. The Exact Change also offers currency exchange services in Terminal T1 Baggage Claim Halls 1 and 2. You can opt for Global Exchange company in Terminal T4 Baggage Claim Halls 10 and 11.

  • Which lounges are available at SEA?

    SEA hosts 12 lounges, including all Alaska Airline Lounges, The Club at SEA, and United Club. Exclusive lounges are The Centurion Lounge in Concourse A and B, British Airways Terraces Lounges in South Satellite Terminal, and USO Lounge for active U.S. military members in the Central Terminal.

  • Are there pet-friendly facilities at SEA?

    Yes. SEA is pet-friendly; hence you can bring along your furry friend. There are four pet relief areas at the airport. If you exit through Concourse B, you can utilize the outdoor pet relief areas near the exit. There are pet relief areas on Level 2 of the South Satellite and North Satellite terminals.

  • What is the cheapest flight from Seattle to Madrid?

    In the last 3 days, the lowest price for a flight from Seattle to Madrid was $255 for a one-way ticket and $484 for a round-trip.

  • Do I need a passport to fly between Seattle and Madrid?

    Yes, you’ll need a passport to travel to Madrid from Seattle.

  • Which aircraft models fly most regularly from Seattle to Madrid?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Madrid?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Seattle and Madrid, with Star Alliance being the most commonly used for this route.

  • What is the most popular layover when flying to Madrid from Seattle?

    London is the most popular layover city among KAYAK users traveling from Seattle to Madrid.

  • Which is the best airline for flights from Seattle to Madrid, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from Seattle to Madrid are Delta and KLM. With an average price for the route of $864 and an overall rating of 7.9, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $924 and an overall rating of 7.7.

  • How does KAYAK find such low prices on flights from Seattle to Madrid?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Madrid.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Madrid?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Madrid from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Madrid?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Madrid with an airline and back to Seattle with another airline. Booking your flights between Seattle and MAD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Madrid?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Madrid from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Seattle to Madrid

  • Seattle Tacoma International Airport (SEA) has enhanced accessibility for travelers with physical and hidden disabilities. The airport has amplified phones for the hearing impaired, accessible toilets, ramps, lowered drinking fountains, and adapted lifts with braille signage. Those who need a wheelchair and additional assistance can request it through their airlines. Accessible parking spaces are available in the car park facility at the airport.
  • SEA International Airport has 50 restaurants, cafés, and fast-food outlets where you can sit and dine or grab a bite while waiting for your flight. You can check out Floret-By Café Flora, Beecher’s Handmade Cheese, or Stonehouse Café and Bar in the Main Terminal for quality coffees or snacks. In the North Satellite, you will find Bambuza and Skillet restaurants. If you are craving seafood, visit Dungeness Bay Seafood House in South Satellite.
  • SEA International Airport offers several parking facilities offering various parking services to its travelers. You will access short-term parking services in Terminal Direct parking on Level 4 next to the terminal, while long-term parking services are available on the same parking on Levels 1 to 3 and 5 to 8. On Levels 4 and 5 of the Terminal Direct parking, there are 48 electric vehicle charging spaces.
  • Madrid Barajas International Airport (MAD) provides family-friendly facilities for family travelers. The airport has kids' play areas designated for kids up to 6 years old in all the airport's terminals at the baggage claims. A breastfeeding lounge is available in Terminal T2 and T4.
  • The MAD Airport hosts business facilities offering services to corporate travelers on business or work trips. There is a multi-functional business center on-site in Terminal 4 with formal waiting lounges and meeting rooms and offers courier, fax, and printing services. You will access the internet, workstations, and working breakfast and lunches in the center.

Reviews of the top 5 airlines serving from Seattle to Madrid

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Madrid. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Madrid? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8187 reviews
7.8Entertainment
7.9Comfort
8.5Crew
7.2Food
8.1Boarding
Airline reviews

boarded at 5:30 pm, pushed away from gate at 6pm ... takeoff was not until ~6:45pm; disappointing

4.0 OkayLawrence, Feb 2026
LGA - JAX
Read more Delta reviews

boarded at 5:30 pm, pushed away from gate at 6pm ... takeoff was not until ~6:45pm; disappointing

Smooth boarding, pleasant and professional lady checking us in. Crew service was excellent, again pleasant, but professional. Nice touch-down on landing! Thank you Delta. 💗

Originally, I was booked in economy. I paid several hundred additional dollars to upgrade to first class. Then I paid several more hundred dollars to change my flight to a slightly earlier flight. I asked if the changed flight would also seat me in first class, and I was told that it would. When I boarded the plane, however, I was seated in economy. So, I paid $500-600 more than I paid for my original ticket for an upgrade and a changed flight - received the changed flight (which was nice), but did not receive the upgrade. So, I was not completely satisfied.

Awesome! On time flight, early arrival, and a complimentary upgrade!

Paid for wifi that didn't work. No plug in seat to work. No entertainment.

We departed early and made up time in the air allowing us to arrive 30 minutes early. Capt was incredibly genuine and thanked every passenger for flying with Delta. Completely humble and professional!

Was forced to check in my small carry on, even though I informed the crew it has very fragile items inside

This was one of the worst flights I’ve been on in years. I upgraded to comfort and had such an uncomfortable experience. The person next to me was oversized - which I understand - however, they took up their space and mine. I could only use about 50% of my seat space to not be physically touching this person the entire flight and there was no spatial awareness. I also could not use the seat outlet because their body was obstructing it. It was very inconvenient. Their body kept touching me repeatedly during the flight and I felt very uncomfortable. To pay more for an upgraded space and then not even being able to use it was highly disappointing.

No wheel chair as requested at Atlanta arrival on first flight.

Only freetext wifi was available in flight; browsing WiFi required payment. Since the seats had no in flight entertainment, Delta should revisit this policy on this longer flight.

Communication on the delay, rebooking and how to get a hotel was poor. Mails, airport check-in and transfer desk said different things.

Not consistent with the food quality (I mean taste not freshness)

Safe and stable made me sleepy and I slept and dreamt 😂😂😂😂

I don’t like that an equipment change caused my seat to change from 23A to 44A. The boarding was also delayed. The crew were excellent, however and very attentive. The food was not bad.

Worst airlines either. First leg was delayed because of crew not available. My connection was missed so they booked me automatically the next day! But, impossible to get anyone on site, web site does not let me access my reservation anymore, confirmed by useless agents over the phone. My 2-leg trip with part in business class arriving at 4:10pm ends up in an awful 3-leg arriving at 9pm the next day with no way to even choose the seats and of course at the very end of the plane. I can understand problems arrive but the way Air France handle it is just unacceptable. You are on your own. Apparently getting you to your destination is the only thing they consider their duty. The customer experience and fatigue is none of their concern. And I have a status with them. I will reconsider my priorities when flying with Air France and encourage everyone to do the same.

Our flight crew were terrific. And they handle a difficult passenger with finesse.

Excellent, Lima to Paris. But Paris to Amsterdam, delayed, missed my flight and KLM treated its missed flights passengers very badly, terribly bad. No hotel accommodation given. Passengers were told to find their own hotel accommodation and claim at reasonable rate and left the booth and literally with armed Police Officers listening to passengers complains. For three hours, after moving by Uber from hotel to hotel and calling and booking online, no hotel was available. I had to return to the airport and seat/sleep on the benches, suffering the cold, and rats running around until my new allocated flight the next day. It was the most terrible KLM treatment even seen and being a Business Class passenger. Still mentally suffering to date as a result.

3 hour delay but out of their control. App said I get vouchers but when I applied for them, they were nowhere to be found in my account

I bought business class tickets but the seats are exactly like economy with no comfort seats nor an empty seat next to me provided. Very poor, low quality airline.

The food was great and the service and attitude was amazing!!

Really like the idea experience on this airline I will use again

The pilot was professional and very good. The flight crew, very young and often looked flustered and overwhelmed. The seats were among the most uncomfortable in the air. The boarding somewhat chaotic. The price reasonable. Overall it was an average budget airline experience...although Iberia is not a budget airline. I fear if Iberia doesn't up it's game customers like us will go elsewhere.

It was fine, older plane with limited entertainment, otherwise fine.

the seats were so cramped you could barely move. it was difficult to eat when passengers would recline their seats. the seats were so flimsy and unstable that whenever someone got in and out of their seat, it bounced like a spring back in your face. the movies were nice. the food was terrible. even though the conditions were terrible, they tried to pressure passengers to relocate their seats to accommodate adults who were related and wanted to sit next to each other, even after the passengers expressed that they did not want to move for that purpose. on the connecting flight, the “service” consisted of items for purchase. even though the flight was only 45 minutes, once again passengers (including me) were pressured to relocate for people to sit next to each other. they couldn’t be apart for 45 minutes? this was much less compelling than being apart for an 8 hour flight.

Everything went smoothly, and we even arrived 40min earlier than scheduled, on an Orland-Madrid route.

The staff was very nice and helpful. Some of the best crew I have met.

Bad experience. The seat room are very tight. The food is not good and the breakfast has no hot drink.

Excellent. Thanks to United Star Alliance, since economy was overbooked, I’m grateful to have been upgraded to Business Class.

Good plane, excellent food, crew and entertainment. Seats in business could use an upgrade

Disaster. Downgraded. Zero apology. No effort or coordination between gate and crew. Awful seat blocked by door emergency slide box. Iberia is a mess. App never works. Avoid this airline.

Excellent service; they helped me reschedule so I can fly in an earlier flight

I had a good comfortable seat. There was nearly an hour delay. There was an accident with the champagne, but I was well compensated. These things happen sometimes.

Service and food were excellent. Incredibly friendly and competent staff. Flight was delayed over and hour and I had to run between terminals to get my connecting flight.

Missed it by a couple minutes and couldn’t find an alternative flight so had to spend the night in DC and after much shuffling from 1 airline to another managed to get a United to Frankfurt.

There were only 2 toilets and one of them did not work in business class. We are not allowed to cross classes so had to wait in line to use the toilets!! The entertainment touch display was finicky and did not work all the time.

We missed our flight. There was not enough time built into the layover to get through immigration, customs, bagclaim, bag rechecking, and the long trip to another terminal and gate. Kayak really screwed up. We took the bus up to Wisconsin and then were picked up in Brookfield by private car. It was lucky we didnt miss the last bus out.

I tried both on line and by calling the Customer Service line to arrange for a special meal as i have food intolerances. I was under the impression from your service representative that I was successful. I was not. I cannot eat spicy foods and get very ill if i eat bell peppers. I could not eat either menu choice and no special meal was actually ordered. ( your representative tried to order it for a flight that did not have meal service!!! - found this out later). Your wonderful cabin crew managed to put together a fruit, salad, roll and cheese tray for me so I had something to eat. WHY WOULD YOU SERVE SPICY FOOD, WITH NO MILDER OPTION,ON AN INTERNATIONAL FLIGHT???

Crew was professional and great, flight was clean. However food was pathetic. I ordered a Hindu meal assuming no meat but they served chicken. Need to be very specific- Hindu meal should be categorize as Vegetarian - no meat or egg. Or it should be specific that we are serving meat.

Late flight Delays Poor service Poor staff Worst airline ever

Ground staff and cabin crew were excellent. Flight was perfectly on time. Zero issues.

We waited at BOS at the gate for an hour and couldn’t get a drink or anything. Once in the air the service, food and ride was excellent.

My enetertainmnet screen was broken. Lost my bags. Almost missed my flight do to connection issues with (despite a request) ZERO help from crew. Food was edible. Potatoes pretty good even

Our Jackson, Mississippi to Dallas Fort Worth flight was delayed on 1/19/26.. This was changed to Jackson to Charlotte in the last minute because of this delay. This started some kind of disconnect between American Airlines and British Airways bookings. We could not go past the passport control in London Heathrow. I had to go to the counter and waited for more than 30 minutes to get a new boarding pass. Problems did not end there. Somehow our entire return flight was canceled by someone. I had to make several phone calls over several days to fix the problem – this was not easy from India. Looks like there was some kind of disconnect between two airlines or some agent did not do it right. I’m anxious to know what went wrong.

The issue was not with BA it was with the link yoiu sent fopr booking the flight

Loved the boarding option from Business class lounge, experience on flight was excellent, plenty of good food choices

Late. And service was very slow - passengers sat for well over an hour with dirty trays etc surrounding them

Getting the boarding passes between the BA and AA apps was very clunky.

The airline was not clear about a new departure time so we got to the airport early anyway. The flight left early which was great because of weather. The check in process was very easy and staff were friendly and helpful. The crew was great and our flight was very good.

The plane was dirty the food was awful and the boarding process took too long

I don't know about the others but the flight attendant that took care of us had the absolute wrong approach "how do we dare asking for water or anything else for that matter"

Everything you need to know for your flight from Seattle to Madrid

Information on your arrival and departure airports