$553 Find Cheap Flights from Vietnam to Illinois

1 adult
1 adult, Economy

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

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to Illinois, as well as popular online travel agencies
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Useful Info

KAYAK's insights & trends for flights to Illinois

Get data-powered insights and trends for flights to Illinois to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Vietnam to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Vietnam to Illinois, 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 Vietnam to Illinois is June, when tickets cost $930 (return) on average. On the other hand, the most expensive months are August and May, when the average cost of round-trip tickets is $2,112 and $1,117 respectively.

How far in advance should I book a flight from Vietnam to Illinois?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to Illinois, 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 Vietnam to Illinois, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.


Good to know

Low seasonMarch
High seasonJuly
Cheapest flight$553
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly with an average 8% increase in price.
Flight from Hanoi to Chicago O'Hare Airport

FAQs for booking flights from Vietnam to Illinois

  • How does KAYAK find such low prices on flights from Vietnam to Illinois?

    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 Vietnam to Illinois.

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

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

    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 from Vietnam to Illinois with an airline and back with another airline.

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

    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 from Vietnam to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest day to fly to Illinois?

    Based on KAYAK data, the cheapest day to fly to Illinois is Monday where round-trip tickets can be as cheap as $1,074. On the other hand, the most expensive day to fly is Friday, where round-trip prices are $1,595 on average.

  • What is the cheapest time of day to fly to Illinois?

    The cheapest time of day to fly to Illinois is generally in the evening, when round-trip flights cost $823 on average. Morning departures are around 44% more expensive than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the morning, which is peak travel time and where the average cost of a ticket is $1,188.

Reviews of the top 3 airlines serving from Vietnam to Illinois

 
See real verified KAYAK customer reviews for airlines flying to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Vietnam to Illinois. 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 Vietnam to Illinois? 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
EVA AirOverall score based on 1204 reviews
8.1Food
8.4Boarding
8.3Comfort
8.6Crew
8.0Entertainment
Airline reviews

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) was kept clean and replenished

10.0 ExcellentDale, May 2025CRK - TPE
Read more EVA Air reviews

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) was kept clean and replenished

I have never heard of EVA air before but I am so happy my wife and I were able to flight on their planes twice. Everything on these flights just felt better than their competitors. As someone with longer legs any bit of extra leg spaces is appreciated. The different options for food and drinks were also a plus. They were extra careful to make sure my wife's eating restrictions were taken care for. They had a before take off and landing announcements on the built in tablets for each seat and it gave out information that was very helpful. Such as what and how to declare your items in the specific country you landed in, any odd items that may be illegal to bring it (and even the reasoning why) and any other information you might need to make your post flight experience better. Oh and the seats were more comfortable, had more ability to lean and the headrest was much better for flight sleeping. The only downside was there were "forced" ads on the tablet at take off for maybe 5-10 minutes but honestly, this flight was the cheapest option and had all the benefits listed above that is such an easy trade off. Im keeping an eye out for EVA air going forward.

I have never heard of EVA air before but I am so happy my wife and I were able to flight on their planes twice. Everything on these flights just felt better than their competitors. As someone with longer legs any bit of extra leg spaces is appreciated. The different options for food and drinks were also a plus. They were extra careful to make sure my wife's eating restrictions were taken care for. They had a before take off and landing announcements on the built in tablets for each seat and it gave out information that was very helpful. Such as what and how to declare your items in the specific country you landed in, any odd items that may be illegal to bring it (and even the reasoning why) and any other information you might need to make your post flight experience better. The only downside was there were "forced" ads on the tablet at take off for maybe 5-10 minutes but honestly, this flight was the cheapest option and had all the benefits listed above that is such an easy trade off. Im keeping an eye out for EVA air going forward.

Sub sandwhich for a snack through mid flight and giving a bottle water was a good idea

Everything is good staff is polite and helpful flights are on time sub sandwhich for a snack was good with a bottle of water only thing maybe more variety of food like breakfast or dinner depends on the time

seats are pitched well. you don't feel too tight.

For the price, it was better than other airlines; quality of food and service was very good.

Movie selection was not as good as recent flights I've taken (EVA and other airlines).

Great but I am not sure why I was placed in zone 4 for boarding despite being an Infinity Member??? Can you explain online. Thanks

Clean plane, friendly crew, mostly on-time departure. Negativo since there were no snacks offered. Cold drinks only was fine due to turbulence, but nothing to eat? Really?

All the food seemed to have onions. I don't eat onions. Anyway, everything else was great. The biggest downside was the underpricer company that purchased the tickets from ANA. Underpricer never provided the United Airlines booking number. ANA was a code share and all our flights were on United. I finally was able get booking numbers from Ujuted on X. They saved me from the upsales underwriter tried to saddle my wife and me with.

Overall the experience was ok. My two complaints are that the food is absolutely disgusting. The movies in the flight to Japan were a completely different selection than the ones on the way back. So if you’re looking forward to watching a certain move on the way back, think again.

That food is absolutely disgusting. Bring your own meals because the food not only smells fowl but tastes even more so. Jesus, I’d rather just eat a protein bar.

Hard to explain because we thought we were booking ANA airlines, not ANA operated via United, so we were disappointed, but for what it’s worth, everything went smooth and loved the movie selections. The food was okay, processed and full of preservatives, so vs what we were expecting with ANA it was different

My wife and I liked almost everything about ANA except for the economy seat space and the cold breakfast (croissant which seemed to just come out of the fridge)

The overall experience was ok, though there was certainly room for improvement. My husband was asked to check his carry-on bag at the gate due to claims that the flight was “full.” However, upon boarding, we observed ample overhead space and several empty rows of seats. This made the request appear unnecessary and caused some discomfort, particularly as he was the only passenger singled out for this procedure.

When booking the flight i picked it because it said flying with ana even on our e-ticket as well but I showed up to the airport and I flew with united. I have flew with both airlines before and I prefer ana for the food quality and comfortable. So I was disappointed in that outcome and felt the food gave me minor ibs. The whole thing was missing leading with not getting what I thought I was paying for. Felt a bait and switched. Do not have confidence in using this app in the future trips

The flight was smooth, but there were not enough options for meals and I was given beef when I do not eat beef. The flight going was much better because we received more snacks.

Thankful for the staff who provided blankets cause the plane was quite cold and no way to adjust the airflow in the seats next to the bathroom.

Uh there was a delay, because of the weather. And what took usually an hour flight to Louisville took about 6+ hours. Flight got canceled

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

I liked that the flight was nonstop from ORD to CIU for $200 round trip.

The schedule to Moline changed 5 times. The gate changed 6 times. That is a pathetic way to run an airline. No wonder that no one in our company flies on United Express to or from Moline. Changes happen most of the time. I learned my lesson on this trip…never again!

All flight attendants could benefit by taking an international flight on Qantas Airline. Qantas attendants are much more hospitable in every way. Much superior than and attendants on any US airline.

While the staff was pleasant and helpful, the following observations are for your awareness. There was some delay on the tarmac on take off and landing. The paid lunch/food offerings were limited. Entertainment was only available on WiFi at a cost.

The first flight was better in terms of the aircraft.

So far so good but food and entertainment are not available for this flight

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.

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

It was my first time with United Airlines and I would say it was very good experience and best of all the flights were on time. Will definitely fly with United Airlines next time.

Book cheap flights from Vietnam to Illinois

Recent round-trip flight deals

 
These are the cheapest round-trip flights to Illinois found on KAYAK in the last 72 hours.
7/16Wed
2 stopsJapan Airlines
34h 19mSGN-ORD
7/29Tue
1 stopJapan Airlines
32h 15mORD-SGN
$829
6/27Fri
1 stopANA
28h 05mSGN-ORD
7/17Thu
1 stopANA
40h 10mORD-SGN
$891
8/29Fri
1 stopEVA Air
31h 20mSGN-ORD
10/15Wed
1 stopEVA Air
21h 25mORD-SGN
$896
7/16Wed
2 stopsUnited Airlines
36h 15mSGN-ORD
7/30Wed
2 stopsUnited Airlines
38h 07mORD-SGN
$908
8/23Sat
2 stopsUnited Airlines
25h 08mSGN-ORD
9/6Sat
2 stopsUnited Airlines
27h 55mORD-SGN
$911
8/30Sat
1 stopCathay Pacific
32h 05mSGN-ORD
10/16Thu
1 stopCathay Pacific
30h 05mORD-SGN
$932
8/30Sat
2 stops
25h 08mSGN-ORD
10/16Thu
2 stops
26h 45mORD-SGN
$946
7/1Tue
1 stopEVA Air
41h 25mSGN-ORD
7/22Tue
1 stopEVA Air
33h 30mORD-SGN
$958
8/23Sat
1 stopCathay Pacific
39h 20mSGN-ORD
9/6Sat
1 stopCathay Pacific
37h 20mORD-SGN
$1,027
7/16Wed
3 stops
31h 53mSGN-ORD
7/30Wed
3 stops
30h 47mORD-SGN
$1,063

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Recent one-way flight deals

 
Only flying one-way? Below are some of the best deals for one-way flights to Illinois found on KAYAK in the last 72 hours.
9/20Sat
2 stops
51h 36mHAN-ORD
$553
11/20Thu
1 stopKorean Air
22h 30mHAN-ORD
$556
9/1Mon
1 stopUnited Airlines
27h 55mSGN-ORD
$559
10/10Fri
1 stopEVA Air
19h 55mSGN-ORD
$560
10/16Thu
1 stopEVA Air
30h 55mSGN-ORD
$561
9/1Mon
2 stopsANA
33h 10mSGN-ORD
$568
10/17Fri
2 stopsUnited Airlines
35h 32mSGN-ORD
$569
6/26Thu
1 stopANA
27h 20mHAN-ORD
$592
10/17Fri
2 stopsDelta
37h 11mSGN-MDW
$596
11/23Sun
2 stopsDelta
24h 27mHAN-ORD
$601

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Last minute flights to Illinois

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights to Illinois that are departing in the next 10 days.
6/22Sun
multi-stopEVA Air
31h 10mSGN-ORD
3/9Mon
multi-stopEVA Air
23h 05mORD-SGN
$4,526
6/22Sun
multi-stopEVA Air
31h 10mSGN-ORD
3/10Tue
multi-stopEVA Air
26h 45mORD-SGN
$5,245
6/22Sun
multi-stopEVA Air
39h 55mSGN-ORD
3/9Mon
multi-stopEVA Air
21h 35mORD-SGN
$5,350
6/22Sun
multi-stop
31h 10mSGN-ORD
3/10Tue
multi-stop
30h 15mORD-SGN
$6,038
6/22Sun
multi-stopEVA Air
27h 06mSGN-ORD
3/10Tue
multi-stopEVA Air
26h 30mORD-SGN
$6,399

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Everything you need to know for your flight to Illinois

Cabin class types available on flights to Illinois

Cabin classes available on flights to Illinois. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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