SEA - SIN

$348 Find Cheap Flights from Seattle to Singapore

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 Singapore departing on 9/4. 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.
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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Singapore.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Singapore.
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Flights Deals

Cheap Flight Deals from Seattle to Singapore (SEA-SIN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Singapore 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.

Recent round-trip flight deals from Seattle to Singapore

KAYAK's recommended round-trip deals from the most popular airlines that fly from Seattle to Singapore.
Discover the best prices for you by selecting your travel dates on KAYAK.
Singapore Airlines Logo
10:15 am - 5:35 pmSEA-SIN
16h 20mnonstop
Singapore Airlines Logo
9:00 am - 8:45 amSIN-SEA
14h 45mnonstop
$646Singapore Airlines
Find Deal
Tue, Sep 16 - Tue, Sep 30
Philippine Airlines Logo
11:35 pm - 6:55 pmSEA-SIN
28h 20m1 stop
Philippine Airlines Logo
10:25 am - 7:15 pmSIN-SEA
23h 50m1 stop
$694Philippine Airlines
Find Deal
Sun, Sep 7 - Sun, Sep 21
Air Canada Logo
2:55 pm - 7:05 amSEA-SIN
25h 10m1 stop
Air Canada Logo
9:10 am - 6:36 pmSIN-SEA
24h 26m1 stop
$707Air Canada
Find Deal
Tue, Sep 16 - Tue, Sep 30
Air Canada Logo
10:00 am - 5:00 amSEA-SIN
28h 00m2 stops
Air Canada Logo
9:10 am - 1:05 pmSIN-SEA
18h 55m1 stop
$714Air Canada
Find Deal
Tue, Sep 16 - Tue, Sep 30
Asiana Airlines Logo
2:15 pm - 9:30 pmSEA-SIN
40h 15m1 stop
Asiana Airlines Logo
10:50 pm - 12:30 pmSIN-SEA
28h 40m1 stop
$831Asiana Airlines
Find Deal
Tue, May 13 - Tue, May 20
Asiana Airlines Logo
2:00 pm - 9:55 pmSEA-SIN
40h 55m1 stop
Asiana Airlines Logo
11:10 pm - 12:35 pmSIN-SEA
29h 25m1 stop
$838Asiana Airlines
Find Deal
Mon, Oct 27 - Wed, Nov 5
Korean Air Logo
12:50 pm - 5:00 amSEA-SIN
25h 10m1 stop
Korean Air Logo
10:30 pm - 10:40 amSIN-SEA
27h 10m1 stop
$847Korean Air
Find Deal
Mon, May 19 - Sun, May 25
Korean Air Logo
7:20 am - 5:00 amSEA-SIN
30h 40m2 stops
Korean Air Logo
1:10 am - 10:40 amSIN-SEA
24h 30m1 stop
$889Korean Air
Find Deal
Tue, May 13 - Mon, May 19
United Airlines Logo
1:00 pm - 6:15 amSEA-SIN
26h 15m1 stop
United Airlines Logo
8:40 pm - 12:54 amSIN-SEA
19h 14m1 stop
$890United Airlines
Find Deal
Mon, Sep 15 - Wed, Oct 1
United Airlines Logo
3:51 pm - 8:00 amSEA-SIN
25h 09m2 stops
United Airlines Logo
10:10 am - 6:27 pmSIN-SEA
24h 17m1 stop
$894United Airlines
Find Deal
Mon, Oct 27 - Mon, Nov 3
Expert advice

Expert advice for your flight from Seattle to Singapore

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airports
SEA

Use the SEA Spot Saver for expedited security screening. Book online or via the flySEA app for free access to dedicated lanes.

Read more about SEAby Harriet Baskas
SIN

For a stress-free arrival, use the City Shuttle from SIN to downtown Singapore. Book via the Changi App or at GTC counters.

Read more about SINby Jessica Macdonald
Our travel experts
Jessica Macdonald

Jessica Macdonald

Expert on SIN

Jessica Macdonald

Jessica Macdonald

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has traveled to more than 50 countries across six continents.

Read more
Harriet Baskas

Harriet Baskas

Expert on SEA

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Useful Info

KAYAK's insights & trends for Seattle to Singapore flights

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

What’s the cheapest day of the week to fly from Seattle to Singapore?

The average price of all round-trip flights from Seattle to Singapore clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Singapore on a Tuesday, as we generally find the cheapest rates on that day for this route. On the other hand, Friday is the most expensive day to fly from Seattle to Singapore. For your return ticket, we recommend flying on a Monday and avoiding Fridays for the best deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Singapore, 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 Singapore is March, where tickets cost $835 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,603 and $1,384 respectively.

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

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 Singapore, 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 Singapore, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Good to know

Low seasonAugust
High seasonDecember
Cheapest flight$348
Best time to beat the crowds but there is an average 9% increase in price.
Most popular time to fly with an average 50% increase in price.
Flight from Seattle to Singapore

When to book flights from Seattle to Singapore

Are your dates flexible? Find out the best times to travel from Seattle to Singapore 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.

Flights from Seattle to Singapore: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew the route from Seattle to Singapore 
Verified travelerFlew with Singapore AirlinesSEA-SINAug 2024
If you need special meals book them early
JeffFlew with Singapore AirlinesSEA-SINJan 2024
Delta & Alaska have best boarding process! Singapore airlines was ok!

FAQs for booking flights from Seattle to Singapore

  • Is a visa required for entry into Singapore?

    For tourist visits of less than 90 days, you will not need to apply for a visa before flying to Singapore. A visa will only be required for business travel and if you plan to stay longer than the 90-day visa-free limit. However, your passport should have at least six months of validity and two pages of entry stamps.

  • What are the layover options from Seattle to Singapore?

    The layover depends on the airline you’re traveling with. The most popular options on this route include London, for British Airways flights, Dubai for Emirates flights, San Francisco when flying with United Airlines, and Incheon when flying with Korean Air. It is important to look up the transit visa requirements before booking to avoid unnecessary inconveniences.

  • Which benefits do I get when I upgrade to first class?

    A first-class ticket makes your trip a lot more comfortable which is especially important for such long-haul trips. You get way more legroom compared to if you were in economy and the seats can recline to a full 180 giving you a makeshift bed which comes in handy with the complimentary pillow. In addition, the meal selection is different and you get up to five-course meals and a premium selection of drinks including wine, champagne, beer, and spirits. Lastly, you get priority boarding for your flight which allows you to settle before departure.

  • How do I access the city center from Singapore Changi Airport (SIN)?

    The Metro is arguably the best transport option to the city center because it is inexpensive and fast connecting to various destinations around the city. However, there is no direct line to the city center meaning you have to change at Tanah Merah Station, and from there you can access any part of the city center. If you have a lot of luggage, the metro can be quite inconvenient, especially during rush hours. A good alternative would be taking a taxi which will drop you at any location you want and the best part is they have a lot of luggage space.

  • What is the cheapest flight from Seattle to Singapore?

    In the last 3 days, the lowest price for a flight from Seattle to Singapore was $348 for a one-way ticket and $646 for a round-trip.

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

    Yes

  • Which airports will I be using when flying from Seattle to Singapore?

    On your way to Singapore, you’ll fly out from Seattle/Tacoma Intl. You’ll be landing at Singapore Changi.

  • Which airlines offer Wi-Fi service onboard planes from Seattle to Singapore?

    Only Asiana Airlines offers inflight Wi-Fi service on the Seattle to Singapore flight route.

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

    The Airbus A350-900 is the aircraft model that flies most regularly on the Seattle to Singapore flight route.

  • Which airline alliances offer flights from Seattle to Singapore?

    Star Alliance is the only airline alliance operating flights between Seattle and Singapore.

  • On which days can I fly direct from Seattle to Singapore?

    You can catch a nonstop flight from Seattle to Singapore on on Tuesday, Thursday, Friday, Saturday, and Sunday.

  • Which is the best airline for flights from Seattle to Singapore, STARLUX Airlines or Korean Air?

    The two airlines most popular with KAYAK users for flights from Seattle to Singapore are STARLUX Airlines and Korean Air. With an average price for the route of $1,135 and an overall rating of 9.1, STARLUX Airlines is the most popular choice. Korean Air is also a great choice for the route, with an average price of $884 and an overall rating of 8.4.

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

    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 Singapore.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Singapore 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 Singapore?

    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 Singapore with an airline and back to Seattle with another airline. Booking your flights between Seattle and SIN 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 Singapore?

    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 Singapore 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 Singapore

  • Looking for a cheap flight? 25% of our users found flights on this route for $350 or less one-way and $931 or less round-trip.
  • Emirates is arguably the best airline to book with when flying Business. The Emirates A380 has private cabins and even a shower spa to keep you refreshed during your travels.
  • Korean Air has the best baggage allowance for travelers flying in economy class. You get a carry-on bag and two checked bags for free which isn’t the case for most airlines as they will only allow a carry-on and maybe one checked bag at best.
  • EVA Air is a good option when traveling with kids. They provide Wi-Fi, seat back on-demand TV, and charging outlets for economy passengers meaning you can keep the kids entertained and distracted for the whole journey.
  • If you’re looking to fly more sustainably, United Airlines is a great option to go with. They are already in the process of investing in sustainable aviation fuel for their flights which should help reduce carbon emissions significantly.
  • The Green Line Sound Transit offers a budget-friendly way to get to Seattle-Tacoma International Airport (SEA) from downtown Seattle. It is also convenient during rush hour to help you avoid traffic.

Prefer to fly direct from Seattle to Singapore?

Find which airlines fly direct from Seattle/Tacoma Intl Airport to Singapore Changi Airport, which days they fly and book direct flights.

Direct departures

Seattle/Tacoma Intl to Singapore Changi

Tuesday

Singapore Airlines

Singapore Airlines

Thursday

Singapore Airlines

Singapore Airlines

Friday

Singapore Airlines

Singapore Airlines

Saturday

Singapore Airlines

Singapore Airlines

Sunday

Singapore Airlines

Singapore Airlines

See more direct flights

Direct returns

Singapore Changi to Seattle/Tacoma Intl

Tuesday

Singapore Airlines

Singapore Airlines

Thursday

Singapore Airlines

Singapore Airlines

Friday

Singapore Airlines

Singapore Airlines

Saturday

Singapore Airlines

Singapore Airlines

Sunday

Singapore Airlines

Singapore Airlines

See more direct flights
See more direct flights

Top 5 airlines serving from Seattle to Singapore

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Singapore. 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 Singapore? 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.
8.4
Korean AirOverall score based on 1068 reviews
8.3Comfort
8.5Boarding
8.2Entertainment
8.1Food
8.7Crew
Airline reviews

They were very accommodating of a dietary issue. Nice movie & tv selections. Non-stop helped get through a very long (15 hr) flight

10.0 ExcellentBrenda, Apr 2025ICN - BOS
Read more Korean Air reviews

They were very accommodating of a dietary issue. Nice movie & tv selections. Non-stop helped get through a very long (15 hr) flight

The delay in Korea was a pain and set us back a day. I have to give big props to Korean Air for setting up a hotel with dinner and transportation to and from the hotel. I also needed assistance with a wheelchair and they did an outstanding job.

Great except for the delay in Korea. Korean Air did a great job setting up a hotel for the night. I also needed assistance with a wheelchair and they were outstanding.

The flight was on time and very quick, as expected, but the leg room isn't great in coach seats.

The food on this flight from NRT to ICN was average. The staff were very friendly, but the flight took about 60 minutes longer than it should have because the pilot was only flying at 330mph instead of 500-550. Not sure what the reason is for that, but it meant for a much longer flight.

Best service I’ve ever had Flight attendants are nicely dressed and look very professional

Just a typical domestic poor flight nothing more. There is no food choices in such a flight. Crew doesn't really care if you are on-board or not

Food choice could be better, plus the crew can walk around and offer snacks and drinks. Also the air-conditioning onboard blows high speed, and very cold makes the trip uncomfortable.

long flights are difficult but the crew and amenities made it a very good experience

Our seat row plus one ahead and behind we're completely overlooked during beverage service...

It was amazing. I was not expecting the phenomenal customer service Asiana provides.

It was all perfect and very pleasant for such long flights

The seats felt very small. We were supplied with pillows and blankets, which was nice. Lots of noise from the bathroom, plus exterior noise. Made it hard to hear the entertainment system, even using my own noise-cancelling headphones. The food was really bad. I generally request a vegetarian meal and one was supplied, but the pasta was cold and hard and there was nothing pleasant about it. Two meals were served on this flight; one was a repeat of the meal I had had on the flight immediately preceding this one, which was bad enough I didn't even try it. Drinks were very limited. All I wanted was water, and on a 10.5 hour flight, I was given 3 cups of about 3 ounces each.

The seats felt very small. We were supplied with pillows and blankets, which was nice. Lots of noise from the bathroom, plus exterior noise. Made it hard to hear the entertainment system, even using my own noise-cancelling headphones. The food was really bad. I generally request a vegetarian meal and one was supplied, but the pasta was cold and hard and there was nothing pleasant about it. Drinks were very limited. All I wanted was water, and on a 4 hour flight, I was given 2 cups of about 3 ounces each.

We took business class, It was comfortable and I was able to sleep.

Everything was perfect. A flight attendant even brought me snacks after I declined food due to my desire to force myself to follow the destination time zone.

For the most part, it was an enjoyable experience. It's the 2nd half of the journey was a bit uncomfortable. It was on a noticable smaller plane compared to the previous one.

Only process that my luggage didn’t make it to my destination because of short connection but I understand

The boarding process was good. The toilet could be better maintained.

This has been the worst experience I've ever had. We arrived to Ho Chi Minh Airport and were supposed to get our Asiana ticket from the transfer counter as we came with a different airline. However, the staff at the transfer counter were not helpful and kept giving us different information. We were first told by Asiana airlines staff we had to wait 2 hours so they could print out and give us our tickets, then someone else told us we had to wait 3hrs, someone told us "I don't know, just go sit and wait and we will tell you later." This was at a place in the Ho Chi Minh airport that had no coffee or food shops, nothing, just immigration (to enter Vietnam with a Vietnam Visa) and security (to transfer into the gates) but we needed our printed boarding pass to go through. It wasn't until we demanded to speak to a supervisor as our flight time was 1hr away because they kept telling us "there's alot of time left for your international flight, we will get your tickets later" we still had to wait around 20minutes for the "Supervisor" to give us our tickets. I would NOT recommend Asiana Airlines, especially if going thru Ho Chi Minh Airport as they are not helpful. (We almost missed our flight, due to their lazyness and incompetence of printing our tickets) I would suggest Asiana Airlines to have a Machine in the transfer area so passengers can easily print out their boarding passes themselves and save some money by not hiring incompetent staff that can't do a simple task such as printing a boarding pass.

We were not given option for meals since they ran out of the other option but good thing the remaining options tasted great.

Both the staff at check-in counter and on board were pleasant and helpful. My chicken and mashed potato was good, sauce was tasty, but the zucchini, carrot n other accompanying vegetables were over-cooked a little. (I understand the meal has to be prepared earlier). Yet I would fly on Singapore Airlines again and recommend it to family and friends.

Horrendous. We upgraded and they took the money but cancelled one of our tickets. The recline action didn’t work on the seats for the flight from Singapore to London, pre booked meals but they seemed to have disappeared as well.. Phone customer service was horrendous. Took 5 phone calls and no fix. Craig at the airport was the only one who seemed to be able to get the ticket back.

The seat in economy class and legroom in Singapore airline are narrower than Korean airlines! I don’t have that comforting feeling flying with Singapore air as in the past!

Loved the airline with the exception of their carry on limitations. They enforce a strict 7 kilo limit for carry on baggage which is ridiculous. We traveled from SFO to SIN with carry on with no difficulty yet when we checked in Delhi they forced us to check the carry on bags. The weight of our carry on bags were 11 and 12 kilos and while they exceeded the limitations set by Singapore Airlines they were well under weight limitations set by may other carriers. Interestingly my wife and I were each allowed two 22 KG bags to check in addition to the 7 kg carry on for a total weight of 102 KG's. Our total weight with the one bag we planned to check and our two carry ons was 46 kgs.

Crew and service was excellent, but passengers should be offered a welcome drink before take off which did not happen. Food was very good. Unfortunately the lie-flat bed in business class was one of the most uncomfortable I have experienced. The configuration forces you to sleep with your legs at an angle instead of in a straight line, plus there is very little padding on the bed so it wasn't possible to sleep for more than 2-3 hours on an 18 hour flight. For what the airlines charges for a business class ticket their hard product leaves a lot to be desired.

Food could have been better. Too many passengers getting up and down all the time.

Delayed 1hour due to storm still didn't get window seat for third flight despite paying £240 extra to book them

Everything was great keep up the good work 😁, can't ask for more.

Flight from SFO did not include entertainment as it was not working the entire duration of the flight. Was informed that there would be a $350 voucher for the inconvenience. Uncertain how the voucher will be provided.

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

A bit rush for transit. Food and entertainment are not available

Boarding was a little difficult. The gate area at O'Hare was very small and crowded due to multiple gates in the area. Could not hear the intercom, so had to rely on signage to see when my group was boarding and the signage was blocked by passengers standing in the gate. Flight was great and we arrived in Montreal on time.

Multiple delays and not straight answer from the United team

For economy, it was very good. Staff was great, they even let some of us change seats for more leg room... Put an empty seat between us which was fantastic for a 12hr flight. Onboard entertainment was excellent, I think over 200 choices of movies/tv/etc The bad was the barely/nonfunctional wifi that cost either $16.99 or 1700 miles (full flight). It was atrocious... Definitely the worst of the last 3 long haul major airlines I was on the last few months.

Stewardess spilled orange juice on my clothes/seat no help no apology just threw napkins at me to clean the mess up. Not Happy.

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

The plane pushed back from the gate on time. However, it stopped on the ramp, and we waited for over 20 minutes before the aircraft pulled back to the gate. Apparently, something of importance had to be removed from the aircraft by the gate agent. I found this to be odd. The delay was not significant, but I felt that whatever was on the aircraft that had to be taken off, should’ve been done before we pushed back from the gate.

I didn’t get on plane. Passport being processed by consulate with visa application. Tried to cancel through underpricer after purchasing cacelling for any reason. No dice, they are thieves.

Electric plugs didn't work. Entertainment system wasn't working

All was good except for the seats, not very comfy.

2.5 hour delay sitting in the plane on the tarmac, you tell me how the experience was

I hope these comments will find their way to AC customer experience team. Me and my spouse 50 years of aged coming back from 7 days perfect vacation... While boarding in FLL flight AC1621, one of the boarding agents (tall aged african american) man literelly yeld at my wife during the picture talking process. MAM ! STEP !! BACK !!! We are not illegal immegrants beying deported, nor are we in the millitary. We are customers returning home. This was unacceptable. While boarding in YYZ flight AC1154, one of the boarding agents (tall aged caucasian) man criticied with several complesant remarks my passport condition saying that I could not travel intl with it due to stain, decoloration, and BLOOD. My passport does not have blood on it! Yes it might be in less than perfect condition, but their are ways to talk to customer that does not imply not allow a boarding agent to be angry fathery like, or a custom agent looking at a suspicious individual. Both experience were less than acceptable for might I remind you a paying CUSTOMER returning home.

Short flight so no food or entertainment. Good landing at SFO and on time. We were told no carryon luggage yet lots of people were puting bags in overhead compartments. The rules need to be made more clear. I was on the first leg of an international flight and this is the first time I could not have carryon luggage.

This flight didn't happen for me because of overbooking.

My flight was overbooked and they would not let me board. I had to book another flight and pay the full amount of that flight. I did not get any help at all from Air Canada or United Airlines.

Comfortable seats and movies entertainment available. Better experience than the flight from Toronto to Denver.

Poor air traffic controller staffing led to a 50%reduction on flights so we got to wait 4 hrs for our flight! Very disorganized at the gate Poor communication with customers

It was delayed by almost 90 minutes and that messed up our plans but it was beyond UA’s control that is what we heard

Terrible experience, flight was delayed both ways. Limited compensation for the 5+ hour delay. Will not be flying Air Canada Rouge, and don’t recommend you do either.

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